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Cited by 150Cosmology and Gravitation TheoriesSpace Science and Extraterrestrial LifeEarth Systems and Cosmic Evolution

The Fine-Tuning of the Universe for Intelligent Life

Open access
Barnes, L. A.·2012·Publications of the Astronomical Society of Australia
DOI 10.1071/as12015
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Abstract

Fiziksel yasalar, sabitler ve başlangıç koşullarındaki ince ayar literatürünü değerlendirir.

Integrity signals

Registry

Crossref · 10.1071/as12015

Cites

126 of 126 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

22 of 167 cited sources checked · 6 supported · 2 flagged · accuracy not yet measured

  • Premisecitation

    The universe re-collapses before life can form for rho_L greater than about -10^-121.

    “The universe re-collapses before life can form for r L t À10 À121 (Peacock 2007).”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Peacock 2007 source

      Section 3 says that highly negative vacuum densities can make the universe turn around before it cools enough for observer formation. That is the opposite direction from the claimed threshold of greater than −10^-121. Our copy also does not state that numerical threshold. (LLM, conf=0.86)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
  • Interpretationcitation

    The evidence that inflation actually happened is quite strong, though not indubitable.

    “The evidence is quite strong, though not indubitable (Turok 2002;Brandenberger 2011).”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Turok 2002 source

      Section 4, “Inflationary perturbations” (page unavailable), says observations had tested the HPZ hypothesis rather than inflation itself, and that the observed pattern is not specific to inflation. Section 6 also describes a paucity of observational tests. Turok thus cautions against treating the evidence as strong evidence that inflation actually happened. (LLM, conf=0.84)

      Checked by a reasoning model — may be wrong.

      Experimental — accuracy not yet measured
    • cites Brandenberger 2011

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Premisecitation

    Life-permitting inflation potentials are highly unnatural.

    “Tegmark (2005, partic-ularly figure 11) argues that on very general grounds we can conclude that life-permitting inflation potentials are highly unnatural.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Tegmark (2005) source

      Figure 11 describes the physically natural expectation for the potential’s energy scales and says the hoped-for model matching the observed fluctuation amplitude does not work in the models examined. The paper also says some models require tuning, but it does not conclude on very general grounds that all life-permitting inflation potentials are highly unnatural; it notes a potentially more compatible natural expectation in supersymmetric models. Our copy provides no page number for these passages. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • Findingcitation

    For the model of Tegmark (2005), the mean value of Q ranges from 10 to almost 10,000.

    “The upper blue region of Figure 4 shows the distribution of Q for the model of Tegmark (2005), using the 'physically natural expectation' m v ¼ m h .The mean value of Q ranges from 10 to almost 10 000.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Tegmark (2005) source

      Section 5.1 describes Tegmark’s model and says its energy scales may naturally satisfy m_h ∼ m_v, supporting the identification of the model used in the citing paper. Our copy does not report a mean Q ranging from 10 to nearly 10,000; instead, its discussion of the Q distribution says quantum diffusion cuts it off around Q ∼ 1. The numerical range appears to be the citing paper’s result, not a value established by this source. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • Premisecitation

    The life-permitting range for Q is given by the inequality (3) derived by Tegmark & Rees (1998).

    “Tegmark & Rees (1998) were the first to calculate the range of Q which permits life, deriving the following limits for the case where r L ¼ 0:”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Tegmark & Rees (1998) source

      Section 3 derives an approximate upper limit of Q ≲ 10⁻⁴, and Section 6 identifies cooling difficulties below Q ≈ 10⁻⁶; the paper says its main analysis assumes a flat universe with zero cosmological constant. But Section 6 explicitly allows that life might arise at more extreme Q values, so these are not strict life-permitting bounds. Our copy also does not establish the claim that Tegmark and Rees were the first to calculate them. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • May combine two claims. 111
  • Classified as probably not a substantial claim. 92

  • May combine two claims.

    Premisecitation

    Inflation predicts a nearly scale-invariant spectrum of fluctuations, but such a spectrum was proposed for independent reasons by Harrison (1970) and Zel'dovich (1972) a decade before inflation was proposed.

    “Inflation predicts a nearly scale-invariant spectrum of fluctuations, but such a spectrum was proposed for independent reasons by Harrison (1970) and Zel'dovich (1972) a decade before inflation was proposed.”
    Quote in the paperNot a substantial claim1 of 2 sources checked
    • cites Harrison (1970)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Zel'dovich (1972) source

  • May combine two claims.

    Findingcitation

    Tegmark (2005) found that the success rate of inflation peaks at about 0.1 percent and drops rapidly as m_h increases or decreases away from m_Pl; even with a scalar field, inflation is far from guaranteed.

    “The success rate peaks at ,0.1 percent, and drops rapidly as m h increases or decreases away from m Pl .Even with a scalar field, inflation is far from guaranteed.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Tegmark (2005) source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    As Ellis et al. (2004) point out, any multiverse proposal will have to deal with the problems of what determines {M; f(m); p}, actualized infinities, non-renormalisability, parameter dependence and non-uniqueness of p, and how one could possibly observationally confirm any of these quantities.

    “As Ellis et al. (2004) point out, any such proposal will have to deal with the problems of what determines {M; f ðmÞ; p}, actualized infinities (in M, f(m) and the spatial extent of universes) and non-renormalisability, the parameter dependence and non-uniqueness of p, and how one could possibly observationally confirm any of these quantities.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
    • cites Ellis et al. (2004) source

      Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

      Experimental — accuracy not yet measured

  • Classified as probably not a substantial claim.

    Premisecitation

    As Linde & Noorbala (2010) explains, one of the main problems is that 'in an eternally inflating universe the total volume occupied by all, even absolutely rare types of the 'universes', is indefinitely large'.

    “As Linde & Noorbala (2010) explains, one of the main problems is that 'in an eternally inflating universe the total volume occupied by all, even absolutely rare types of the 'universes', is indefinitely large'.”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Linde & Noorbala (2010) source

  • May combine two claims.

    Premisecitation

    In the cold big bang, nucleosynthesis generally proceeds further than in our universe, creating an approximately solar metallicity intergalactic medium and a 25% helium mass fraction.

    “Nucleosynthesis generally proceeds further than in our universe, creating an approximately solar metalicity intergalactic medium along with a 25% helium mass fraction 35 .”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites [35] 35. Cs ot o, A., Oberhummer, H. & Schlattl, H., 2001, NuPhA, 688, 560 source

      The Abstract describes a QCD calculation of light-hadron masses and mentions the early universe only in connection with a transition from quarks and gluons to hadrons. Searches for cold-big-bang nucleosynthesis, solar metallicity, and a 25% helium mass fraction found no passage addressing those claims in our copy. (LLM, conf=0.77)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Interpretationcitation

    The cold big bang does not alter nuclear physics and thus still relies on the triple-alpha process to create carbon in the early universe.

    “The CBB does not alter nuclear physics and thus still relies on the triple-a process to create carbon in the early universe; see the more detailed discussion of CBB nucleosynthesis inAguirre (1999, p. 22).”
    Quote in the paperSubstantial claim1 of 1 sources checked
    • cites Aguirre (1999, p. 22) source

      Section 2 assumes the standard model of particle physics, and Section 4 identifies triple-alpha fusion as the most obvious reaction forming carbon. But Section 4 also says that this reaction becomes ineffective before carbon reaches appreciable abundance in some cold big bang models. The paper therefore does not support an unqualified claim that the process creates primordial carbon. (LLM, conf=0.83)

      Experimental — accuracy not yet measured

  • May combine two claims.

    Findingcitation

    To make our universe, we would need around 10^90 Planck volumes, all arranged to transition to a classical expanding phase within a temporal window 100,000 times shorter than the Planck time.

    “To make our universe, we would need around 10 90 such Planck volumes, all arranged to transition to a classical expanding phase within a temporal window 100 000 times shorter than the Planck time 11 .”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingcitation

    The result that non-flat FLRW universes are infinitely unlikely is independent of x_max and y_max and holds in the limit x_max, y_max -> infinity.

    “Note that this is independent of x max and y max , and in particular holds in the limit x max , y max -N.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Findingreasoning

    The neutron-proton mass difference is 1.29 MeV, well within the range of m_d - m_u from 1 to ... MeV.

    “The neutron-proton mass difference is 1.29 MeV, well within that range.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Noether's theorems do not allow us to pull physically significant conclusions out of a mathematical hat.

    “Neother's theorems do not allow us to pull physically significant conclusions out of a mathematical hat.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Physicists are free to postulate theories which are not Lorentz invariant, and a great deal of experimental and theoretical effort has been expended to this end.

    “Physicists are perfectly free to postulate theories which are not Lorentz invariant, and a great deal of experimental and theoretical effort has been expended to this end.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Kostelecky ´& Russell (2011)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Pospelov & Romalis (2004)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationnone given

    If ours were the only universe, and the causes that established the physics of our universe were indifferent to whether it would evolve life, then the chances of hitting upon a life-permitting universe are very small.

    “The intuition here is that, if ours were the only universe, and if the causes that established the physics of our universe were indifferent to whether it would evolve life, then the chances of hitting upon a life-permitting universe are very small.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationnone given

    Many of Stenger's claims will be found to be highly problematic.

    “Many of Stenger's claims will be found to be highly problematic.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    The existence of gravity is not implied by the existence of the universe, separate masses or accelerating frames.

    “The existence of gravity is not implied by the existence of the universe, separate masses or accelerating frames.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationnone given

    To know whether a certain symmetry holds in nature, one needs a laboratory or a telescope, not a blackboard.

    “If you want to know whether a certain symmetry holds in nature, you need a laboratory or a telescope, not a blackboard.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Any solution of the GR equation is covariant, or PoVI, but it does not follow that a particular solution will exhibit any symmetries.

    “Thus, any solution of the GR equation is covariant, or PoVI.But it does not follow that a particular solution will exhibit any symmetries.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    For the universe to contain sufficient amounts of ordinary baryonic matter, interactions in the early universe must violate baryon number conservation, charge-symmetry and charge-parity-symmetry, and must spend some time out of thermal equilibrium.

    “Sakharov (1967) showed that for the universe to contain sufficient amounts of ordinary baryonic matter, interactions in the early universe must violate baryon number conservation, charge-symmetry and charge-parity-symmetry, and must spend some time out of thermal equilibrium.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Sakharov (1967)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Above the blue line, there is only one stable element, a single particle D++, with the chemistry of helium, an inert monatomic gas above 4 K with no known stable chemical compounds.

    “Above the blue line, there is only one stable element, which consists of a single particle D þþ .This element has the chemistry of helium -an inert, monatomic gas (above 4 K) with no known stable chemical compounds.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    Stenger has failed to solve the entropy problem; he has presented the problem itself as its solution, and homogeneous isotropic expansion cannot solve the entropy problem because it is the entropy problem.

    “We conclude that Stenger has failed to solve the entropy problem.He has presented the problem itself as its solution.Homogeneous, isotropic expansion cannot solve the entropy problem -it is the entropy problem.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisenone given

    If electrons were bosons rather than fermions, they would not obey the Pauli exclusion principle and there would be no chemistry.

    “If electrons were bosons, rather than fermions, then they would not obey the Pauli exclusion principle.There would be no chemistry.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Stenger's statement that in the fine-tuning view there is no wedge and the point has infinitesimal area, so the probability of finding life is zero, is not true of the scientific literature; the wedge is a straw man.

    “Stenger further distorts the case for fine-tuning by saying: 'In the fine-tuning view, there is no wedge and the point has infinitesimal area, so the probability of finding life is zero.' (FOFT 70) No reference is given, and this statement is not true of the scientific literature.The wedge is a straw man.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Premisecitation

    Tegmark et al. (2006) Table 4 summarizes 8 anthropic constraints on the 7 dimensional parameter space (a, b, m_p, rho_L, Q, x, x_baryon).

    “See Table 4 of Tegmark et al. (2006) for a summary of 8 anthropic constraints on the 7 dimensional parameter space (a, b, m p , r L , Q, x, x baryon ).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Tegmark et al. (2006)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisenone given

    If the strong force were long-range rather than short-range, there would be no atoms, and any structures would be uniform, spherical, undifferentiated lumps of arbitrary size incapable of complexity.

    “If the strong force were a long rather than short-range force, then there would be no atoms.Any structures that formed would be uniform, spherical, undifferentiated lumps, of arbitrary size and incapable of complexity.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    Stars in a universe with a bound diproton would be significantly different from our own, and detailed predictions for their formation and evolution have not been investigated.

    “However, stars in such a universe would be significantly different to our own, and detailed predictions for their formation and evolution have not been investigated.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Above the green curve, neutrons in nuclei decay, so hydrogen is the only stable element.

    “Above the green curve, neutrons in nuclei decay, so that hydrogen is the only stable element.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim.

    Premisecitation

    Figure 2 top right shows boundaries of 9 independent life-permitting criteria in the quark-mass parameter space.

    “Figure 2 (top right) zooms in on a region of parameter space, showing boundaries of 9 independent lifepermitting criteria:”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    Even if the symmetries of the laws of nature were logically necessary, it would still be an open question as to precisely which symmetries were broken in our universe and which were unbroken.

    “Even if the symmetries of the laws of nature were logically necessary, it would still be an open question as to precisely which symmetries were broken in our universe and which were unbroken.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisereasoning

    The entropy of the universe is not at its theoretical maximum, and since entropy cannot decrease, the universe must have started in a very special, low entropy state.

    “The fact that the entropy of the universe is not at its theoretical maximum, coupled with the fact that entropy cannot decrease, means that the universe must have started in a very special, low entropy state.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Barr & Khan (2007) explored the parameter space of a model in which up-type and down-type fermions acquire mass from different Higgs doublets, varying the masses of the up and down quarks; the natural scale for these masses ranges over 60 orders of magnitude.

    “Barr & Khan (2007) explored the parameter space of a model in which up-type and down-type fermions acquire mass from different Higgs doublets.As a first step, they vary the masses of the up and down quarks.The natural scale for these masses ranges over 60 orders of magnitude and is illustrated in Figure 2 (top left).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisenone given

    The electromagnetic force allows matter to cool into galaxies, stars, and planets; without such interactions, all matter would be like dark matter, forming only large diffuse roughly spherical haloes and subhaloes.

    “The electromagnetic force allows matter to cool into galaxies, stars, and planets.Without such interactions, all matter would be like dark matter, which can only form into large, diffuse, roughly spherical haloes of matter whose only internal structure consists of smaller, diffuse, roughly spherical subhaloes.”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    Stenger simply assumes that the universe is homogeneous and isotropic; once homogeneity and isotropy are assumed, the entropy problem does not seem so hard.

    “Stenger simply assumes that the universe is homogeneous and isotropic.We can see this also in his use of the Friedmann equation, which assumes that spacetime is homogeneous and isotropic.Not surprisingly, once homogeneity and isotropy have been assumed, the entropy problem doesn't seem so hard.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationnone given

    Fine-tuning is not about what the parameters and laws are in a particular universe; rather, given some other set of laws, we ask what is the probability that a universe chosen at random from the set of universes with those laws would support intelligent life.

    “In reply, fine-tuning isn't about what the parameters and laws are in a particular universe.Given some other set of laws, we ask: if a universe were chosen at random from the set of universes with those laws, what is the probability that it would support intelligent life?”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    MacDonald & Mullan (2009) show that while a 13% increase in the strength of the strong force will bind the diproton, a less than 50% increase is needed to significantly affect the amount of hydrogen left over for stars.

    “For example, MacDonald & Mullan (2009) show that while an increase in the strength of the strong force by 13% will bind the diproton, a ,50% increase is needed to significantly affect the amount of hydrogen left over for stars.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites MacDonald & Mullan (2009)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    Stenger's assertion that the universe starts out with maximum entropy or complete disorder is false; a homogeneous, isotropic spacetime is an incredibly low entropy state.

    “Stenger's assertion that 'the universe starts out with maximum entropy or complete disorder' is false.A homogeneous, isotropic spacetime is an incredibly low entropy state.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Spontaneous symmetry breaking allows the laws of nature to retain their symmetry and yet have asymmetric solutions.

    “SSB allows the laws of nature to retain their symmetry and yet have asymmetric solutions.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Strocchi 2007 source

  • May combine two claims.

    Premisenone given

    Fine-tuning relies on a number of independent life-permitting criteria; failing any of these criteria makes life dramatically less likely, if not impossible.

    “In response, fine-tuning relies on a number of independent life-permitting criteria.Fail any of these criteria, and life becomes dramatically less likely, if not impossible.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    To significantly change the probability of a life-permitting universe, we would need a prior that centres close to the observed value and has a narrow peak; this exchanges one fine-tuning for two, the centre and peak of the distribution.

    “In short, to significantly change the probability of a lifepermitting universe, we would need a prior that centres close to the observed value, and has a narrow peak.But this simply exchanges one fine-tuning for two -the centre and peak of the distribution.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationreasoning

    The wedge commits the flippant funambulist fallacy.

    “The wedge thus commits the flippant funambulist fallacy (Section 2).”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Below the red line, a proton in a nucleus can capture an orbiting electron and become a neutron, so atoms are unstable.

    “Below this red line, a proton in a nucleus can capture an orbiting electron and become a neutron.Thus, atoms are unstable.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Above the red line, the deuteron is strongly unstable, decaying via the strong force, so the first step in stellar nucleosynthesis in hydrogen burning stars would fail.

    “Above this red line, the deuteron is strongly unstable, decaying via the strong force.The first step in stellar nucleosynthesis in hydrogen burning stars would fail.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Below the red curve, the diproton is stable; two protons can fuse to helium-2 via a very fast electromagnetic reaction rather than the much slower weak nuclear pp-chain.

    “Below this red curve, the diproton is stable 9 .Two protons can fuse to helium-2 via a very fast electromagnetic reaction, rather than the much slower, weak nuclear pp-chain.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationnone given

    If we vary x only and calculate P_x, and then vary y only and calculate P_y, we must not simply multiply P_w = P_x P_y; doing so will certainly underestimate the probability inside the wedge, assuming a single wedge.

    “If we vary x only and calculate P x , and then vary y only and calculate P y , we must not simply multiply P w ¼ P x P y .This will certainly underestimate the probability inside the wedge, assuming that there is only a single wedge.”
    Quote in the paperNot a substantial claim
    • The authors state this as an assumption: There is only a single wedge.

  • May combine two claims.

    Premisecitation

    Above the red line, production of deuterium in stars absorbs energy rather than releasing it, and the deuterium is unstable to weak decay.

    “Above this red line, the production of deuterium in stars absorbs energy rather than releasing it.Also, the deuterium is unstable to weak decay.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    There are a number of problems with Stenger's argument, the most severe of which arises even if we assume his calculation is correct.

    “There are a number of problems with Stenger's argument, the most severe of which arises even if we assume that his calculation is correct.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    If epsilon is small enough, the wedge is a tightrope; we have opened up more parameter space in which life can form, but also more parameter space in which life cannot form.

    “If is small enough, then the wedge is a tightrope.We have opened up more parameter space in which life can form, but we have also opened up more parameter space in which life cannot form.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Below the blue line, the only stable element is a single particle D-, which can combine with a positron to produce an element with the chemistry of hydrogen; a handful of chemical reactions are possible, with the most complex product being an analogue of H2.

    “Below this blue line, the only stable element consists of a single particle D À , which can combine with a positron to produce an element with the chemistry of hydrogen.A handful of chemical reactions are possible, with their most complex product being (an analogue of) H 2 .”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Barr & Khan (2007)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim.

    Premisecitation

    Penrose's reasoning is that if the universe started at t1 with an extremely homogeneous spacetime and ended at t2 with an extremely inhomogeneous spacetime full of black holes, then the t2 spacetime represents a significantly higher entropy state than the t1 spacetime.

    “Penrose's reasoning is very simple.If we started at t 1 with an extremely homogeneous spacetime, and then allowed a few billion years of entropy increasing processes to take their toll, and ended at t 2 with an extremely inhomogeneous spacetime, full of black holes, then we must conclude that the t 2 spacetime represents a significantly higher entropy state than the t 1 spacetime.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Penrose (1979)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based). May combine two claims.

    Interpretationnone given

    With no physical model of the inflaton, the necessary coupling between the inflaton and ordinary matter or radiation is another postulate, but not an implausible one.

    “With no physical model of the inflaton, the necessary coupling between the inflaton and ordinary matter/radiation is another postulate, but not an implausible one.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisenone given

    Inflation is not a specific model but a family of models sharing an early epoch of accelerating expansion; it is an effect rather than a cause.

    “Firstly, inflation isn't a specific model as such; it is a family of models which share the desirable trait of having an early epoch of accelerating expansion.Inflation is an effect, rather than a cause.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based). May combine two claims.

    Premisereasoning

    If inflation ends, its energy must be converted into ordinary matter; inflation must not result in a universe filled with pure radiation or dark matter, which cannot form complex structures.

    “If inflation ends, we need its energy to be converted into ordinary matter (Condition I5).Inflation must not result in a universe filled with pure radiation or dark matter, which cannot form complex structures.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Inflation predicts a Gaussian random field of density fluctuations, but this is not unique to inflation because of the central limit theorem.

    “Inflation predicts a Gaussian random field of density fluctuations, but thanks to the central limit theorem this isn't particularly unique (Peacock 1999, p. 342, 503).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Peacock 1999 source

  • May combine two claims.

    Premisenone given

    There is no physical theory that predicts the form of the inflaton potential; different potentials and initial conditions produce different predictions.

    “There is no physical theory that predicts the form of the inflaton potential.Different potentials, and different initial conditions for the same potential, will produce different predictions.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisenone given

    Inflation solves the flatness, horizon, and monopole problems and gives concrete, testable, seemingly correct predictions for the origin of cosmic structure.

    “The achievements of inflation are truly impressive -in one fell swoop, the universe is sent on its expanding way, the flatness, horizon, and monopole problem are solved and we have concrete, testable and seemingly correct predictions for the origin of cosmic structure.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisereasoning

    To set up a life-permitting universe, inflation must end in the right way: the universe must be reheated with ordinary matter, and the post-inflation field must not possess a large negative potential energy that would cause quick recollapse.

    “I5.Inflation must end in the right way.Inflation will have exponentially diluted the mass-energy density of the universe -it is this feature that allows inflation to solve the monopole problem.Once we are done inflating the universe, we must reheat the universe, i.e. refill it with ordinary matter.We must also ensure that the post-inflation field doesn't possess a large, negative potential energy,”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Since life requires an almost-flat universe, inflation is potentially a solution to a particularly impressive fine-tuning problem; without inflation, the density of a life-permitting universe at the Planck time must be tuned to 60 decimal places.

    “Since life requires an almost-flat universe (Barrow & Tipler 1986, p. 408ff.),inflation is potentially a solution to a particularly impressive fine-tuning problem -sans inflation, the density of a life-permitting universe at the Planck time must be tuned to 60 decimal places.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Barrow & Tipler 1986

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    The question is not why the low entropy state was at the beginning of the universe, but why the universe was ever in a low entropy state.

    “The question is not why the low entropy state was at the beginning of the universe, but why the universe was ever in a low entropy state.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationcitation

    I1 is a bare hypothesis: we know of no deeper reason why there should be an inflaton field at all, and there is no direct evidence for its existence.

    “I1 is a bare hypothesiswe know of no deeper reason why there should be an inflaton field at all.It was hoped that the inflaton field could be the Higgs field (Guth 1981).Alas, it wasn't to be, and it appears that the inflaton's sole raison d'e ˆtre is to cause the universe's expansion to briefly accelerate.There is no direct evidence for the existence of the inflaton field.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Guth 1981

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    I4 is non-trivial: the inflaton potential must have a region where the slow-roll approximation does not hold; if the inflaton rolls into a local minimum while the SRA still holds, inflation never ends.

    “I4 is non-trivial.The inflaton potential (or, more specifically, the region of the inflaton potential which actually determines the evolution of the field) must have a region in which the slow-roll approximation does not hold.If the inflaton rolls into a local minimum (at f 0 ) while the SRA still holds (which requires V(f 0 ) c m Pl 2 / 8p d 2 V/df 2 9 f 0 Peacock 1999, p. 332), then inflation”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Peacock 1999 source

  • May combine two claims.

    Interpretationreasoning

    Inflation is a clever solution of the flatness and horizon problem, but could be rendered unnecessary by a quantum-gravity theory of initial conditions; the evidence for inflation is impressive but circumstantial.

    “Inflation is a clever solution of the flatness and horizon problem, but could be rendered unnecessary by a quantum-gravity theory of initial conditions.The evidence for inflation is impressive but circumstantial.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisereasoning

    To set up a life-permitting universe, inflation must last: the inflaton must obey slow roll conditions for sufficiently long, with the number of e-folds greater than about 60 to solve the horizon and flatness problems.

    “I3.Inflation must last.While the inflaton field controls the dynamics of the expansion of the universe, we need it to obey the slow roll conditions for a sufficiently long period of time.The 'amount of inflation' is usually quantified by N e , the number of e-folds of the size of the universe.To solve the horizon and flatness problems, this number must be greater than ,60.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S1 (asserted). May combine two claims.

    Interpretationcitation

    Hollands & Wald (2002b) contend that inflation does need special initial conditions: a collapsing universe would require an astonishing sequence of correlations and coincidences to convert all matter into a scalar field with enough kinetic energy to roll to the top of its potential and remain balanced long enough for deflation; the region of final-condition-space resulting from deflation is much较小

    “Hollands & Wald (2002b) 15 contend not, for the following reason.Consider a collapsing universe.It would require an astonishing sequence of correlations and coincidences for the universe, in its final stages, to suddenly and coherently convert all its matter into a scalar field with just enough kinetic energy to roll to the top of its potential and remain perfectly balanced there for long enough”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Hollands & Wald (2002b)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisereasoning

    Requirement I6 brought about the downfall of old inflation: when it ended, it did so in expanding bubbles too small to account for the homogeneity of the observed universe, and reheating only occurs when bubbles collide; as the space between bubbles is still inflating, homogeneity cannot be achieved.

    “Requirement I6 brought about the downfall of 'old' inflation.When this version of inflation ended, it did so in expanding bubbles.Each bubble is too small to account for the homogeneity of the observed universe, and reheating only occurs when bubbles collide.As the space between the bubbles is still inflating, homogeneity cannot be achieved.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The cosmological constant problem is arguably the most severe theoretical problem in high-energy physics today.

    “The cosmological constant problem is described in the textbook of Burgess & Moore (2006) as 'arguably the most severe theoretical problem in high-energy physics today, as measured by both the difference between observations and theoretical predictions, and by the lack of convincing theoretical ideas which address it'.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Burgess & Moore (2006)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    More generally, the value of Q that results from inflation depends on the potential and initial conditions.

    “More generally, the value of Q that results from inflation depends on the potential and initial conditions.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Inflation proposes that the universe underwent a period of accelerated expansion in its earliest stages.

    “We turn now to cosmic inflation, which proposes that the universe underwent a period of accelerated expansion in its earliest stages.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Premisenone given

    If the solution is just as fine-tuned as the problem, then no progress has been made.

    “if the solution is just as fine-tuned as the problem, then no progress has been made.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Post inflation, our universe settles into the minimum at f = f0, and the V0 term contributes to the effective cosmological constant.

    “Post inflation, our universe settles into the minimum at f 5 f 0 , and the V 0 term contributes to the effective cosmological constant.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    The puzzle is not just to understand why the zero point energy does not gravitate, but why it gravitates in some environments but not in vacuum.

    “The puzzle is not just to understand why the zero point energy does not gravitate, but why it gravitates in some environments but not in vacuum.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    The cosmological constant problem is not a problem only at the Planck scale and thus quantum gravity is unlikely to provide a solution.

    “The cosmological constant problem is not a problem only at the Planck scale and thus quantum gravity is unlikely to provide a solution.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisereasoning

    The vacuum polarisation contribution to the Lamb shift gives a nonzero contribution to the energy of the atom, and thus by the equivalence principle must couple to gravity.

    “The vacuum polarisation contribution to the Lamb shift is known to give a nonzero contribution to the energy of the atom, and thus by the equivalence principle must couple to gravity.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Supersymmetry, if it holds in our universe, would reduce the required fine-tuning of the cosmological constant to one part in ~10^50.

    “Supersymmetry, if it holds in our universe, would cancel out some of the contributions to the vacuum energy, reducing the required fine-tuning to one part in ,10 50 .”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Supersymmetry won't help solve the cosmological constant problem.

    “Supersymmetry won't help.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    If the dark energy scale is the Planck scale, then r_Q is 120 orders of magnitude larger than the life-permitting scale, exchanging the fine-tuning of the cosmological constant for the fine-tuning of dark energy.

    “In that case, r Q is once again 120 orders of magnitude larger than the life-permitting scale, and we have simply exchanged the fine-tuning of the cosmological constant for the fine-tuning of dark energy.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    There is a window of opportunity for stars: too small and they won't ignite and sustain nuclear fusion, too large and radiation pressure will dominate over thermal pressure, allowing unstable pulsations.

    “There is a window of opportunity for stars -too small and they won't be able to ignite and sustain nuclear fusion at their cores, being supported against gravity by degeneracy rather than thermal pressure; too large and radiation pressure will dominate over thermal pressure, allowing unstable pulsations.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barrow & Tipler (1986)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    The inflaton field is yet another contributor to the vacuum energy of the universe, and one with universe-accelerating pedigree.

    “Further, the inflaton field is yet another contributor to the vacuum energy of the universe, and one with universeaccelerating pedigree.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationnone given

    Quintessence and the inflaton field are just more fields whose vacuum state must be sternly commanded not to gravitate, or else mutually balanced to an alarming degree.

    “Quintessence and the inflaton field are just more fields whose vacuum state must be sternly commanded not to gravitate, or else mutually balanced to an alarming degree.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationnone given

    There is no known symmetry that would set V0 = 0, because we do not know what the inflaton is.

    “There is no known symmetry that would set V 0 ¼ 0, because we do not know what the inflaton is.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    There is some physical reason why the large contributions to the vacuum energy of the universe don't make it life-prohibiting.

    “There is some reason -some physical reasonwhy the large contributions to the vacuum energy of the universe don't make it life-prohibiting.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Even with logarithmic axes, fine-tuning cannot be avoided because zero is a possible value of G and thus is part of parameter space.

    “Even with logarithmic axes, fine-tuning cannot be avoided -zero is a possible value of G, and thus is part of parameter space.”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim.

    Premisenone given

    Quintessence has an equation of state w = p/rho that causes the expansion of the universe to accelerate if w < -1/3.

    “One could appeal to an as-yet-unknown form of energy called quintessence, which has an equation of state w 5 p/r that causes the expansion of the universe to accelerate 21 (w , À1/3).”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Nongravitational physics depends only on energy differences, so the standard model cannot respond to the actual value of the cosmological constant it sources.

    “ynongravitational physics depends only on energy differences, so the standard model cannot respond to the actual value of the cosmological constant it sources.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Bousso (2008)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationcitation

    Quintessence is a unicorn in a duck outfit (i.e., pure speculation).

    “Quintessence is a unicorn in a duck outfit.We are discounting a form of energy with a plausible, independent theoretical underpinning in favour of one that is pure speculation.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Most proposed inflation mechanisms operate near the Planck scale, so this defines the possible range of V0.

    “Most proposed inflation mechanisms operate near the Planck scale, so this defines the possible range of V 0 .”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    A logarithmic axis, by placing G = 0 at negative infinity, puts an infinitely large region of parameter space outside of the life-permitting region, so stable stars would require infinite fine-tuning.

    “A logarithmic axis, by placing G ¼ 0 at negative infinity, puts an infinitely large region of parameter space outside of the life-permitting region.Stable stars would then require infinite fine-tuning.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    For hydrogen to exist, m_e, m_n - m_p must hold; otherwise the electron will be captured by the proton to form a neutron.

    “For hydrogen to exist -to power stars and form water and organic compounds -we must have m e , m n À m p .Otherwise, the electron will be captured by the proton to form a neutron (Hogan 2006;Damour & Donoghue 2008).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Hogan 2006

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Damour & Donoghue 2008

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    The Hoyle resonance in carbon is one of the most famous examples of fine-tuning.

    “One of the most famous examples of fine-tuning is the Hoyle resonance in carbon.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    The typical energy of chemical reactions must be much smaller than the typical energy of nuclear reactions to ensure atomic constituents maintain identity in chemical reactions; this requires alpha^2 beta / alpha_s^2 << 1.

    “We require that the typical energy of chemical reactions is much smaller than the typical energy of nuclear reactions.This ensures that the atomic constituents of chemical species maintain their identity in chemical reactions.This requires a 2 b/a s 2 { 1 (Barrow & Tipler 1986, p. 320).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Barrow & Tipler 1986

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The right solid line shows the boundary of the condition that protons be stable on stellar timescales (beta^2 > alpha (alpha_G exp alpha^{-1})^{-1}).

    “The right solid line shows the boundary of the condition that protons be stable on stellar timescales (b 2 .a (a G exp a À1 ) À1 , Barrow & Tipler 1986, p. 358).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Barrow & Tipler 1986

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    For v > 1e-16, the neutron is heavier than the proton by more than the nucleon's binding energy, so that even bound neutrons decay into protons and no nuclei larger than hydrogen are stable.

    “for v .10 À16 , the neutron is heavier than the proton by more than the nucleon's binding energy, so that even bound neutrons decay into protons and no nuclei larger than hydrogen are stable;”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Agrawal et al. (1998a, b)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    The left solid line shows the lower limit alpha > 1/180 for a grand-unified theory to unify no higher than the Planck scale.

    “The left solid line shows the lower limit a .1/180 for a grand-unified theory to unify no higher than the Planck scale.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    Modelling the later, post-hydrogen-burning stages of stellar evolution is difficult even for modern codes, and the inclusion of He-shell flashes seems to lessen the degree of fine-tuning of the Hoyle resonance.

    “Modelling the later, post-hydrogen-burning stages of stellar evolution is difficult even for modern codes, and the inclusion of He-shell flashes seems to lessen the degree of fine-tuning of the Hoyle resonance.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Schlattl et al. (2004)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    This ensures that the photons emitted by stars have the right energy to break chemical bonds, permitting photosynthesis.

    “In other words, it ensures that the photons emitted by stars have the right energy to break chemical bonds.This permits photosynthesis, allowing electromagnetic energy to be converted into and stored as chemical energy in plants.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The 0+ state is known as a breathing mode, and all nuclei have such a state.

    “As Cohen (2008) notes, the 0 þ state is known as a breathing mode; all nuclei have such a state.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Cohen (2008)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Unless alpha_s/alpha_s,0 > 1.003 + 0.031 alpha/alpha_0, the diproton has a bound state, which affects stellar burning and big bang nucleosynthesis.

    “Unless a s /a s,0 t 1.003 þ 0.031a/a 0 (Davies 1972), the diproton has a bound state, which affects stellar burning and big bang nucleosynthesis.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Davies 1972

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim.

    Interpretationnone given

    The fact that our universe isn't particularly close to the life-permitting boundary is irrelevant to fine-tuning as defined.

    “Note further that the fact that our universe (the triangle in Figure 5) isn't particularly close to the life-permitting boundary is irrelevant to fine-tuning as we have defined it.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    A change of 0.4% in the strength of the nucleon-nucleon force would make carbon-based life impossible, because stars would produce either almost solely carbon or oxygen, but not both.

    “Even with a change of 0.4% in the strength of [nucleon-nucleon] force, carbon-based life appears to be impossible, since all the stars then would produce either almost solely carbon or oxygen, but could not produce both elements.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Oberhummer, Cs ot o & Schlattl (2000a)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Damour & Donoghue (2008) concluded that unless 0.78e-17 < v < 3.3e-17 hydrogen is unstable to the reaction p+e->n+nu (if v is too small) or else there is no nuclear binding at all (if v is too large).

    “Damour & Donoghue (2008) refined the limits of Agrawal et al. by considering nuclear binding, concluding that unless 0.78 Â 10 À17 , v , 3.3 Â 10 À17 hydrogen is unstable to the reaction p”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Damour & Donoghue (2008)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Jaffe et al. (2009) examined a different slice through parameter space, varying the masses of the quarks while holding as much as possible of the rest of the Standard Model phenomenology constant.

    “Jaffe et al. (2009) examined a different slice through parameter space, varying the masses of the quarks while 'holding as much as possible of the rest of the Standard Model phenomenology constant' [emphasis original].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Jaffe et al. (2009)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationcitation

    The masses must be sufficiently small but not too small.

    “The masses must be sufficiently small but not too small.”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    Gould (2010) argued that three or more generations of quarks and leptons are required for CP violation, which is one of the necessary conditions for baryogenesis.

    “Gould (2010) has argued that three or more generations of quarks and leptons are required for CP violation, which is one of the necessary conditions for baryogenesis (Sakharov 1967;Cahn 1996;Schellekens 2008).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Gould (2010)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S4 (based).

    Premisenone given

    The strength of the strong force alpha_s is a function of the energy of the interaction.

    “The strength of the strong force a s is a function of the energy of the interaction.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    For v > 2e-14, only the D++ particle is stable and the only stable nucleus has the chemistry of helium.

    “for v . 2 Â 10 À14 , only the D þþ particle is stable and the only stable nucleus has the chemistry of helium;”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Agrawal et al. (1998a, b)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    If all neutrinos are heavy, then neutrons would be stable and big bang nucleosynthesis would leave no hydrogen for stars and organic compounds.

    “If all neutrinos are heavy, then neutrons would be stable and big bang nucleosynthesis would leave no hydrogen for stars and organic compounds.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Tegmark, Vilenkin & Pogosian (2005)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    For v < 2e-19, stars will form very slowly (<10^17 yr) and burn out very quickly (<1 yr), and the large number of stable nucleon species may make nuclear reactions so easy that the universe contains no light nuclei.

    “for v t 2 Â 10 À19 , stars will form very slowly (,10 17 yr) and burn out very quickly (,1 yr), and the large number of stable nucleon species may make nuclear reactions so easy that the universe contains no light nuclei.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Agrawal et al. (1998a, b)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Hall & Nomura (2008) state that v/L_QCD ~ 1 is required so that the baryon asymmetry of the early universe is not washed out by sphaleron effects.

    “Hall & Nomura (2008) state that v/L QCD , 1 is required 'so that the baryon asymmetry of the early universe is not washed out by sphaleron effects' (see also Arkani-Hamed et al. 2005).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Hall & Nomura (2008)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Lambda_QCD is the mass-energy scale at which alpha_s diverges.

    “L QCD is the mass-energy scale 30 The most charitable reading of Stenger's claim is that he is referring to the constituent quark model, wherein the mass-energy of the cloud of virtual quarks and gluons that surround a valence quark in a composite particle is assigned to the quark itself.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Premisecitation

    Hogan (2006) concluded that increases in v/L_QCD of more than a few percent lead to major changes in the overall cosmic carbon creation and distribution.

    “Hogan (2006) reached a similar conclusion: 'In the absence of an identified compensating factor, increases in [v/L QCD ] of more than a few percent lead to major changes in the overall cosmic carbon creation and distribution'.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Hogan (2006)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    Only nuclear stability is considered, so that a universe is deemed congenial if both carbon and hydrogen are stable.

    “Only nuclear stability is considered, so that a universe is deemed congenial if both carbon and hydrogen are stable.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Jaffe et al. (2009)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    If the LHC discovers that supersymmetry is a (broken) symmetry of our universe, this would not be the discovery that the universe could not have been different; it would at most show that our universe has chosen a particularly elegant and beautiful way to be life-permitting.

    “Finally, suppose that the LHC discovers that supersymmetry is a (broken) symmetry of our universe.This would not be the discovery that the universe could not have been different.It would not be the discovery that the masses of the fundamental particles must be small.It would at most show that our universe has chosen a particularly elegant and beautiful way to be life-permitting.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Premisenone given

    In Planck units, Lambda_QCD ~ 10^-20 m_Pl.

    “In Planck units, L QCD E 10 À20 m Pl .”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Stars in the weakless universe will burn at a lower temperature, and probably with shorter lifetimes.

    “Stars will burn at a lower temperature, and probably with shorter lifetimes.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Premisecitation

    Harnik, Kribs & Perez (2006) attempted to find a region of parameter space which is life-permitting in the absence of the weak force, and plausibly discovered one.

    “Harnik, Kribs & Perez (2006) attempted to find a region of parameter space which is life-permitting in the absence of the weak force.With some ingenuity, they plausibly discovered one, subject to the following conditions.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Harnik, Kribs & Perez (2006)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S1 (asserted), S3 (load-bearing), S4 (based).

    Premisenone given

    The question why Lambda_SM << m_Pl is known as the mu-problem.

    “This is known in the literature as 'the m-problem', in reference to the parameter in the supersymmetric potential that sets the relevant mass scale.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Premisecitation

    Jaffe et al. fix the electron mass, and vary Lambda_QCD so that the average mass of the lightest baryon(s) is 940 MeV, as in our universe.

    “In particular, they fix the electron mass, and vary L QCD so that the average mass of the lightest baryon(s) is 940 MeV, as in our universe.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Jaffe et al. (2009)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    To make this work in our universe, we need alpha_s(m_U) ~ 1/25, and m_U ~ 10^16 GeV.

    “To make this work in our universe, we need a s (m U ) E 1/25, and m U E 10 16 GeV (De Boer & Sander 2004).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites De Boer & Sander 2004

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Premisecitation

    Low-energy supersymmetry does not by itself explain the magnitude of the weak scale, though it protects it from radiative correction.

    “Low-energy supersymmetry does not by itself explain the magnitude of the weak scale, though it protects it from radiative correction (Barr & Khan 2007).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Barr & Khan 2007

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    The value of mu in our universe is probably 10^2-10^3 GeV.

    “The value of m in our universe is probably ,10 2 -10 3 GeV.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Premisenone given

    The probability of a thermal fluctuation decreases exponentially with its volume.

    “Because the probability of a thermal fluctuation decreases exponentially with its volume.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationnone given

    When Stenger compares two different values for the quark masses (3.3 MeV and 1.5-3 MeV), he is comparing two measurements, not a theoretical calculation with an experimental measurement.

    “When Stenger compares two different values for the quark masses (3.3 MeV and 1.5-3 MeV), he is not comparing a theoretical calculation with an experimental measurement.He is comparing two measurements.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    We can rephrase the claim 'if space were not three dimensional, then life would not exist' as 'if whatever exists were not such that it is accurately described on macroscopic scales by a model with three space dimensions, then life would not exist'.

    “We just rephrase the claim: instead of 'if space were not three dimensional, then life would not exist', we instead claim 'if whatever exists were not such that it is accurately described on macroscopic scales by a model with three space dimensions, then life would not exist'.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationnone given

    If some meta-law is proposed to physically generate a multiverse, then we need to postulate not just that the meta-law holds in this universe, but that it holds in some pre-existing metaspace beyond our universe.

    “If some meta-law is proposed to physically generate a multiverse, then we need to postulate not just a.) that the meta-law holds in this universe, but b.) that it holds in some pre-existing metaspace beyond our universe.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationreasoning

    Emergent does not imply subjective.

    “But emergent does not imply subjective.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Cahn notes that if the couplings are fixed at high energy, then their value at low energy depends on the masses of particles only ever seen in particle accelerators.

    “Cahn (1996) notes that if the couplings are fixed at high energy, then their value at low energy depends on the masses of particles only ever seen in particle accelerators.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Cahn (1996)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    As Stenger has presented it, grand unification is a cane toad solution, as no attempt is made to assess whether the GUT parameters are fine-tuned.

    “As Stenger has presented it, grand unification is a cane toad solution, as no attempt is made to assess whether the GUT parameters are fine-tuned.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    The pattern α3 > α2 > α1 seems to be generic, since the antiscreening or asymptotic freedom effect is more pronounced for larger gauge groups, which have more types of virtual gluons.

    “The pattern a 3 c a 2 .a 1 seems to be generic, since 'the antiscreening or asymptotic freedom effect is more pronounced for larger gauge groups, which have more types of virtual gluons' (Wilczek 1997).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Wilczek 1997

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    This is the 'measure problem' of cosmology, on which there is an extensive literature - Page (2011a) lists 70 scientific papers.

    “This is the 'measure problem' of cosmology, on which there is an extensive literature -Page (2011a) lists 70 scientific papers.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Page (2011a)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    The multiverse is an explanation for the occurrence of an unlikely event like a lottery win: perhaps there are more universes sufficiently numerous and varied that it is not too improbable that at least one would be in the life-permitting subset.

    “The multiverse is just such an explanation.Perhaps there are more universes out there (in some sense), sufficiently numerous and varied that it is not too improbable that at least one of them would be in the lifepermitting subset of possible-physics-space.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    This replaces the fine-tuning of the white area with the fine-tuning of the line-segment, plus the constraints placed on the other GUT parameters to ensure that the dotted line passes through the white region at all.

    “This replaces the fine-tuning of the white area with the fine-tuning of the line-segment, plus the constraints placed on the other GUT parameters to ensure that the dotted line passes through the white region at all.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    LQCD does not address either the life-permitting range or the possible range of quark masses.

    “LQCD doesn't address either.It demonstrates that (with no small amount of cleverness) one can measure the quark masses in our universe.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisenone given

    The principle of mediocrity is a self-consistency test for a multiverse proposal; it cannot pick out a unique multiverse as the 'real' multiverse, but can be quite powerful.

    “This is a selfconsistency test -it cannot pick out a unique multiverse as the 'real' multiverse -but can be quite powerful.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    Stenger fails to distinguish between the concordance model of cosmology, which has excellent empirical support but in no way predicts a multiverse, and speculative models of the early universe, only some of which predict a multiverse, all of which rely on hypothetical physics, and none of which have unambiguous empirical support, if any at all.

    “Stenger fails to distinguish between the concordance model of cosmology, which has excellent empirical support but in no way predicts a multiverse, and speculative models of the early universe, only some of which predict a multiverse, all of which rely on hypothetical physics, and none of which have unambiguous empirical support, if any at all.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    All that we should conclude from Stenger's discussion is that the parameters (α1, α2, α3) can be calculated given α_U and M_U.

    “All that we should conclude from Stenger's discussion is that the parameters (a 1 , a 2 , a 3 ) can be calculated given a U and M U .”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    We not only need the right GUT symmetry, we need to make sure it breaks in the right way.

    “In other words, we not only need the right GUT symmetry, we need to make sure it breaks in the right way.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    There is more than one way to unify the forces of the standard model (SU(5), SO(10), E8 and more), and more than one way to break the GUT symmetry.

    “Note also that, just as there are more than one way to unify the forces of the standard model -SU(5), SO(10), E 8 and more -there is also more than one way to break the GUT symmetry.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    A multiverse is not part of nor a prediction of the concordance model of cosmology.

    “A multiverse is not part of nor a prediction of the concordance model of cosmology.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    Anthropic reasoning seems to provide interesting limits on GUTs, though much work remains to be done in this area.

    “We conclude that anthropic reasoning seems to provide interesting limits on GUTs, though much work remains to be done in this area.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    The constraint beta^{1/4} < 1/3 would require a 20-fold decrease in the proton mass to be violated, which translates to decreasing alpha_U by ~0.003.

    “The constraint shown, b 1/4 , 1/3 would require a 20-fold decrease in the proton mass to be violated, which (using Equation 7) translates to decreasing a U by ,0.003.”
    Quote in the paperSubstantial claim

  • Classified as probably not a substantial claim.

    Interpretationreasoning

    The fallacy of explaining the point of impact by the initial velocity makes much of Chapters 7 to 10 of FOFT irrelevant.

    “This fallacy alone makes much of Chapters 7 to 10 of FOFT irrelevant.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    Stenger has compared our universe with our universe and found no evidence of fine-tuning.

    “Stenger has compared our universe with our universe and found no evidence of fine-tuning.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    The electromagnetic contribution would tend to make the charged proton heavier than the neutral neutron, so the mass difference of the light quarks must be large enough to overcome this contribution.

    “This would tend to make the (charged) proton heavier than the (neutral) neutron, and hence we need the mass difference of the light quarks to be large enough to overcome this contribution.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

    Interpretationnone given

    If 'whatever works' was four dimensional, then life would not exist, whether the number of dimensions is simply a human invention or an objective fact about the universe.

    “If 'whatever works' was four dimensional, then life would not exist, whether the number of dimensions is simply a human invention or an objective fact about the universe.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    A number of authors have emphasised the life-permitting properties of the particular combination of one time- and three space-dimensions, going back to Ehrenfest (1917) and Whitrow (1955), summarised in Barrow & Tipler (1986) and Tegmark (1997).

    “A number of authors have emphasised the life-permitting properties of the particular combination of one time-and three space-dimensions, going back to Ehrenfest (1917) and Whitrow (1955), summarised in Barrow & Tipler (1986) and Tegmark (1997) 32 .”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Ehrenfest (1917)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Whitrow (1955) source
    • cites Barrow & Tipler (1986)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim.

    Interpretationreasoning

    Stenger's discussion of the neutron-proton mass difference has no relevance to fine-tuning because it does not discuss the life-permitting range or the possible range of m_n - m_p (or its relation to the possible range of m_d - m_u).

    “There is no discussion of the life-permitting range, no discussion of the possible range of m n À m p (or its relation to the possible range of m d À m u ), and thus no relevance to fine-tuning whatsoever.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    If we suppose that α and α_s are related linearly to α_U, then the GUT would constrain the point (α, α_s) to lie on the blue dot-dashed line in Figure 6.

    “If we suppose that a and a s are related linearly to a U , then the GUT would constrain the point (a, a s ) to lie on the blue dot-dashed line in Figure 6.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S4 (based).

    Interpretationnone given

    The parameters of the standard model remain some of the best understood and most impressive cases of fine-tuning.

    “The parameters of the standard model remain some of the best understood and most impressive cases of fine-tuning.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisecitation

    LQCD does not calculate the quark masses from the fundamental parameters of the standard model; the quark masses are fundamental parameters of the standard model.

    “LQCD does not calculate the quark masses from the fundamental parameters of the standard model -they are fundamental parameters of the standard model.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Iwasaki 2000

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationreasoning

    FOFT has compared the electron mass in our universe with the electron mass in universes 'like ours', thus missing the point entirely.

    “FOFT has compared the electron mass in our universe with the electron mass in universes 'like ours', thus missing the point entirely.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Premisereasoning

    In the cold big bang, structure formation is not suppressed by CMB radiation pressure, so stars and galaxies require a smaller value of Q.

    “Structure formation is not suppressed by CMB radiation pressure, and thus stars and galaxies require a smaller value of Q.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationnone given

    Most of the multiverse scenario is still hypothetical.

    “Sadly, most of this scenario is still hypothetical.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Premisecitation

    The cold big bang is a model of the universe in which the primordial ratio of photons to baryons is Z_g approximately 1.

    “The cold big bang (CBB) is a model of the universe in which the (primordial) ratio of photons to baryons is Z g , 1.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Aguirre (2001)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationnone given

    Anthropic coincidences involve a happy consonance between a physical quantity and the requirements of complex, embodied intelligent life.

    “Anthropic coincidences, on the other hand, involve a happy consonance between a physical quantity and the requirements of complex, embodied intelligent life.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    The multiverse would predict what we expect to observe by predicting what conditions hold in universes able to support observers.

    “The multiverse would predict what we expect to observe by predicting what conditions hold in universes able to support observers.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationcitation

    This creates problems for inflationary multiverses, which are either fine-tuned to have the prior for Q to peak near the observed value, or else are steep functions of Q in the anthropic range.

    “This creates problems for inflationary multiverses, which are either fine-tuned to have the prior for Q to peak near the observed value, or else are steep functions of Q in the anthropic range (Graesser et al. 2004;Feldstein, Hall & Watari 2005).”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites Graesser et al. 2004

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

    • cites Feldstein, Hall & Watari 2005

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    This requirement is set by the homogeneity of our universe.

    “This requirement is set by the homogeneity of our universe.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    The anthropic coincidences are so arresting because we are accustomed to thinking of physical laws and initial conditions as being unconcerned with how things turn out.

    “The anthropic coincidences are so arresting because we are accustomed to thinking of physical laws and initial conditions as being unconcerned with how things turn out.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    Wilczek argues that it strains credulity that parameters determined uniquely by abstract theoretical principles just happen to exhibit all the apparent fine-tunings required to produce a universe containing complex structures.

    “Here is Wilczek (2006b): 'It is logically possible that parameters determined uniquely by abstract theoretical principles just happen to exhibit all the apparent fine-tunings required to produce, by a lucky coincidence, a universe containing complex structures.But that, I think, really strains credulity.'”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Wilczek (2006b)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Length contraction in special relativity is not just an optical illusion resulting from the finite speed of light.

    “Length contraction in special relativity is not just an optical illusion resulting from the finite speed of light.See, for example,Penrose (1959).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Penrose (1959)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Interpretationreasoning

    The lack of an adequate definition of 'an observer' and of knowledge of all possible forms of life is reason for caution but not a fatal flaw of fine-tuning.

    “This is reason for caution, but not a fatal flaw of fine-tuning.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationcitation

    It would be the ultimate anthropic coincidence if beauty and complexity in the mathematical principles of the fundamental theory of physics produced all the necessary low-energy conditions for intelligent life.

    “Finally, it would be the ultimate anthropic coincidence if beauty and complexity in the mathematical principles of the fundamental theory of physics produced all the necessary low-energy conditions for intelligent life.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    The predictions of the inflationary multiverse are very sensitive to the measure, and thus in the absence of a measure, we cannot conclude that it survives the test of the principle of mediocrity.

    “The predictions of the inflationary multiverse are very sensitive to the measure, and thus in the absence of a measure, we cannot conclude that it survives the test of the principle of mediocrity.”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    Molecular cooling requires higher densities and metallicities, but not too high, or planetary orbits will be disrupted by collisions.

    “Various compensating factors are needed along the way -we need a smaller value of Q, which renders atomic cooling inefficient, so we must rely on molecular cooling, which requires higher densities and metalicities, but not too high or planetary orbits will be disrupted collisions (whose frequency increases as Z g À4 Q 7/2 ).”
    Quote in the paperSubstantial claim

  • May combine two claims.

    Interpretationreasoning

    In the cold big bang life-permitting region, a smaller value of Q is needed, which renders atomic cooling inefficient, so molecular cooling must be relied on.

    “Various compensating factors are needed along the way -we need a smaller value of Q, which renders atomic cooling inefficient, so we must rely on molecular cooling, which requires higher densities and metalicities, but not too high or planetary orbits will be disrupted collisions (whose frequency increases as Z g À4 Q 7/2 ).”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Carroll & Tam (2010) argue that the Gibbons-Hawking-Stewart canonical measure renders an inflationary solution to the flatness problem superfluous.

    “We should also note thatCarroll & Tam (2010) argue that the Gibbons-Hawking-Stewart canonical measure renders an inflationary solution to the flatness problem superfluous.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Carroll & Tam (2010)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Classified as probably not a substantial claim. May combine two claims.

    Interpretationreasoning

    Observers like us will die out, and eventually Boltzmann brains, dreaming that they are us, will outnumber us.

    “Observers like us will die out, and eventually Boltzmann brains, dreaming that they are us, will outnumber us.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Boltzmann brains can fluctuate into existence with memories of being observers like us.

  • May combine two claims.

    Interpretationreasoning

    It is unlikely that the set of life-permitting universes is much larger than previously thought, because the physics relevant to life is low-energy physics and thus well-understood.

    “This is unlikely, since the physics relevant to life is low-energy physics, and thus well-understood.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    Fine-tuning is not a typical scientific problem, that is, a phenomenon in our universe that cannot be explained by our current understanding of physical laws.

    “Fine-tuning is not a typical scientific problem, that is, a phenomenon in our universe that cannot be explained by our current understanding of physical laws.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    If the current accelerating phase of the universe persists arbitrarily into the future, then our universe will become vacuum dominated.

    “This could be a problem in our universe -if the current, accelerating phase of the universe persists arbitrarily into the future, then our universe will become vacuum dominated.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: The current accelerating phase of the universe could persist arbitrarily into the future.

  • May combine two claims.

    Premisenone given

    Particles and antiparticles pair off and mutually annihilate to photons as the universe cools, so the excess of particles over antiparticles determines the value of Z_g.

    “Particles and antiparticles pair off and mutually annihilate to photons as the universe cools, so the excess of particles over antiparticles determines the value of Z g .”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationcitation

    The claim that the laws of nature are fixed by logical and mathematical necessity is demonstrably wrong, because theoretical physicists find it easy to describe alternative universes free from logical contradiction.

    “If the claim is that the laws of nature are fixed by logical and mathematical necessity, then this is demonstrably wrong -theoretical physicists find it rather easy to describe alternative universes that are free from logical contradiction (Davies, in Davies 2003).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Davies, in Davies 2003

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    The counter-argument presented in Stenger's book does not address the possibility of a deity which intervenes to sustain life in this universe.

    “The counter-argument presented in Stenger's book (page 252), borrowing from a paper by Ikeda and Jeffreys, does not address this possibility.Rather, it argues against a deity which intervenes to sustain life in this universe.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    Most multiverse mechanisms seem to fall into the category of creating more small universe domains than large ones.

    “Most multiverse mechanisms seem to fall into this category.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing), S4 (based).

    Interpretationcitation

    As with the Boltzmann multiverse, the problem is that this universe seems uncomfortably roomy.

    “As with the Boltzmann multiverse, the problem is that this universe seems uncomfortably roomy.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationcitation

    This result would seem to show that non-flat FLRW universes are infinitely unlikely.

    “This is a puzzling result -it would seem to show that non-flat FLRW universes are infinitely unlikely, so to speak.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    For the cold big bang to be a serious contender as a model of our universe, there would need to be an early population of luminous objects such as PopIII stars.

    “To be a serious contender as a model of our universe (in which Z g , 10 9 ) there would need to be an early population of luminous objects e.g.PopIII stars.”
    Quote in the paperNot a substantial claim

  • Classified as probably not a substantial claim.

    Interpretationnone given

    For every observer who really is a carbon-based life form evolved on a planet orbiting a star in a galaxy, there are vastly more observers in a Boltzmann-brain multiverse for whom this is a passing dream, the fleeting fancies of a phantom fluctuation.

    “The worry is that, for every observer who really is a carbonbased life form who evolved on a planet orbiting a star in a galaxy, there are vastly more for whom this is all a passing dream, the few, fleeting fancies of a phantom fluctuation.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: Boltzmann brains can fluctuate into existence with memories of being observers like us.

  • May combine two claims.

    Interpretationreasoning

    Beauty and simplicity are not necessity.

    “Beauty and simplicity are not necessity.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning

    The multiverse may yet solve the fine-tuning of the universe for intelligent life, but it will not be an easy solution.

    “The multiverse may yet solve the fine-tuning of the universe for intelligent life, but it will not be an easy solution.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Study design and conductreasoning

    The estimate that a small change in a_U will not significantly change a appears to hold because the dependence seems to be flatter than linear.

    “This estimate assumes that this small change in a U will not significantly change a.The dependence seems to be flatter than linear, so this assumption appears to hold.”
    Quote in the paperSubstantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Interpretationnone given

    There are several things wrong with the scenario, not least that such a scenario is unstable to gravitational collapse.

    “Actually, there are several things wrong, not least that such a scenario is unstable to gravitational collapse.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    In the absence of weak decay, the weakless universe will conserve each individual quark number.

    “In the absence of weak decay, the weakless universe will conserve each individual quark number.”
    Quote in the paperNot a substantial claim

  • May combine two claims.

    Interpretationreasoning

    Region 1 depends on the proton-neutron mass difference, which doesn't change with L_QCD and thus does not place a constraint on a_U.

    “For example, Region 1 depends on the proton-neutron mass difference, which doesn't change with L QCD and thus does not place a constraint on a U .”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductreasoning

    The limit on a holds for constant C; as C appears to depend on a, the corresponding limit on a may be a different plane to the one shown in Figure 6.

    “Even this limit should be noted with caution, as it holds for constant C. As C appears to depend on a, the corresponding limit on a may be a different plane to the one shown in Figure6.”
    Quote in the paperNot a substantial claim

  • Probably not a substantial claim: may not pass S2 (checkable), S3 (load-bearing).

    Interpretationreasoning

    Aguirre (2001) is justifiably eager to demonstrate that stars will plausibly form in a CBB universe.

    “Aguirre (2001) is thus justifiably eager to demonstrate that stars will plausibly form in a CBB universe.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Aguirre (2001)

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

183 of 183

  • The authors state this as an assumption.

    The probability distribution over the parameters x and y is uniform.

    “The probability of a life-permitting universe, assuming that the probability distribution is uniform in (x, y) -which, as Stenger notes, is 'the best we can do' (FOFT 72) -is the ratio of the area inside the wedge to the area inside the dashed box.”

  • The authors state this as an assumption.

    The possible range of y can be conservatively estimated by y0.

    “We conservatively estimate the possible range of y by y 0 .”

  • The authors state this as an assumption.

    The full life-permitting criterion that defines the wedge is given by the equation 1 - y/x = (y0/x0)(1 + epsilon).

    “Suppose the full life-permitting criterion that defines the wedge is, 1 À y=x y 0 =x 0 1 þ ;ð2Þ”

  • The authors state this as an assumption.

    There is only a single wedge.

    “This will certainly underestimate the probability inside the wedge, assuming that there is only a single wedge.”

  • The authors state this as an assumption.

    The parameters x and y can vary from zero to x_max and y_max, and these maximum values may approach infinity.

    “Here, x and y are two physical parameters that can vary from zero to x max and y max , where we can allow these values to approach infinity if so desired.”

  • The paper relies on this without support.

    The range of densities that permit the existence of cosmic structure in a long-lived universe is very narrow.

    “Now let's note the range of densities that permit the existence of cosmic structure in a long-lived universe.We find that this range is very narrow.”

  • The paper relies on this without support.

    The range of densities that permit cosmic structure neatly straddles the critical density.

    “Very conveniently, this range neatly straddles the critical density.”

  • The paper relies on this without support.

    In our universe, the amplitude of primordial fluctuations Q is approximately 2 × 10^-5.

    “In our universe, its value is Q E 2 Â 10 À5 , meaning that in the early universe the density at any point was typically within 1 part in 100 000 of the mean density.”

  • The paper relies on this without support.

    QFT predicts contributions to the vacuum energy of the universe that are ~10^120 times greater than the observed total value.

    “A wellunderstood and well-tested theory of fundamental physics (Quantum Field Theory -QFT) predicts contributions to the vacuum energy of the universe that are ,10 120 times greater than the observed total value.”

  • The paper relies on this without support.

    The electron vacuum energy does gravitate in some situations.

    “The first is that we know that the electron vacuum energy does gravitate in some situations.”

  • The paper relies on this without support.

    Intelligent life requires stars to produce both carbon and oxygen.

    “The ability of stars in our universe to produce both carbon and oxygen seems to be a rare talent.”

  • The paper relies on this without support.

    The conditions listed (hydrogen existence, stable atoms, chemistry, stable stars) are necessary for life.

    “For hydrogen to exist -to power stars and form water and organic compounds -we must have m e , m n À m p .”

  • The authors state this as an assumption.

    The life-permitting region can be assessed by varying one or two constants while holding the others at their observed values.

    “The life-permitting region (shown in white) in the (a, b) (left) and (a, a s ) (right) parameter space, with other constants held at their values in our universe.”

  • The paper relies on this without support.

    There is no successful theory of baryogenesis and leptogenesis.

    “We are thus again faced with the absence of a successful theory of baryogenesis and leptogenesis.”

  • The paper relies on this without support.

    A multiverse measure exists that allows comparison of the sizes of life-permitting islands.

    “If the other island is significantly larger than ours (for a given multiverse measure), then observers should expect to be on the other island.”

  • The paper relies on this without support.

    Boltzmann brains can fluctuate into existence with memories of being observers like us.

    “We should be wary of any multiverse which allows for single brains, imprinted with memories, to fluctuate into existence.”

  • The paper relies on this without support.

    The current accelerating phase of the universe could persist arbitrarily into the future.

    “if the current, accelerating phase of the universe persists arbitrarily into the future, then our universe will become vacuum dominated.”
17 of 17

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The amplitude of primordial fluctuations q=Q_obs≈2×10^-5 is the dimensionless value of interest.

    “The amplitude of primordial fluctuations, q = Q obs ≈ 2 × 10 -5 , is here the dimensionless value of interest [25].”

    From Is cosmological tuning fine or coarse? (2021) · cites this paper as [25]

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Inflationary outcomes are assigned to the wrong figure

    Minor

    The text attributes the five- and six-pointed stars to Figure 4, but its description places those stars in Figure 3. Figure 4 is described as showing inflation success rates and cosmological parameters.

1 of 1

Cites

Flagged first, then by citations

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Cited by

Sorted by citations

Related

Authors
Barnes, L. A.
Affiliations
The University of Sydney (AU)
Corresponding author
Barnes, L. A.
ORCID
Barnes, L. A.
Venue
Publications of the Astronomical Society of Australia
Publisher
Cambridge University Press (CUP)
Published
2012
Volume
29
Issue
4
Pages
529-564
ISSN
  • 1323-3580 (ISSN-L)
  • 1448-6083
DOI
10.1071/as12015
OpenAlex
W2138231363
Cited by
150
References
125
Citations by year
2026: 10 · 2025: 25 · 2024: 8 · 2023: 13 · 2022: 5 · 2021: 8 · 2020: 21 · 2019: 24 · 2018: 4 · 2017: 13 · 2016: 5 · 2015: 8 · 2014: 2 · 2013: 2 · 2012: 1
FWCI
2.92
Type
journal article
Language
en
Open access
Licence
www.cambridge.org/core/terms (unspecified, 367 d)
Locations
  • Publications of the Astronomical Society of Australia (publishedVersion)
  • arXiv (Cornell University) (publishedVersion)
  • reroDoc Digital Library (submittedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, other-oa)
  • arXiv (Cornell University)
  • ETH Zürich Research Collection
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Space Science and Extraterrestrial Life
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Earth Systems and Cosmic Evolution
Keywords
fine-tuning, intelligent life, multiverse, laws of nature, initial conditions, cosmic inflation, entropy, galaxy formation

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-12.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-12.

Cited sources are checked by gpt-6-sol.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

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