The DOI matches its Crossref record; 16 of the 16 references it cites were found in a registry or an index; none of the 29 sources its claims cite is checked for support yet.
One into two will not go: conceptualising conjoined twins
Open accessAbstract
This paper is written in response to controversial judicial decisions following separation surgery on conjoined twins "Jodie" and "Mary". The courts, it is argued, seem to have conceptualised the twins as "entangled singletons" requiring medical intervention to render them physically separate and thus "as they were meant to be", notwithstanding the death of the weaker twin, "Mary". In contrast, we argue that certain notions, philosophical and biological, of what human beings are intended to be, are problematic. We consider three compelling conceptualisations of conjoined twins and advocate a model that conceives them as two psychologically separate individuals who happen to share a body, the sharing of a body being integral to the individuality of each twin. While we reject an "essentialist" view of the conjoined state, a view which might render separation surgery unthinkable in all cases, we nevertheless argue against an "adversarial" interpretation of conjoined twins' respective best interests. We maintain that the physical entanglement should be regarded as a shared problem rather than one posed by one twin to the other. And if, after deliberation, separation surgery is deemed the "least detrimental alternative" or the "lesser of two evils", then there should be recognition of what conjoined twins will lose, as well as gain, through separation. The current drive to separate twins at all costs may evince a deeper unease with bodily configurations that appear to threaten the premium that the Western ethical and legal tradition places on personal sovereignty, and the physical circumscription that such sovereignty assumes.
Overview
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
73 Own interpretation · 28 Sources not found
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“While we reject an ''essentialist'' view of the conjoined state, a view which might render separation surgery unthinkable in all cases, we nevertheless argue against an ''adversarial'' interpretation of conjoined twins' respective best interests.”
plain- Asserted: passes — The authors put it forward as true.
- Checkable: unclear — It is unclear whether it could be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“We argue that this is difficult to maintain.”
plain- Asserted: passes — The authors put it forward as true.
- Checkable: unclear — It is unclear whether it could be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
In the paper
“Brooke LJ appears to have derived his notion of bodily integrity (and inviolability?) directly from the sanctity of life doctrine: ''the doctrine of the sanctity of life respects the integrity of the human body'' (Re A, 1 1051).”
What the sources say
- Not matchedcites Re A
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
hedgedstates a causeSingle case- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Not matched
A conclusion the paper draws from its own results — it cites no other source for it, so there is none to check. The quote shows it is in the paper.
In the paper
“As a result, they were led quite easily into using language that suggested that Jodie and Mary (or at least one of them) were in wrongful and harmful contact with each other.”
hedgedstates a cause- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
In the paper
“In English law, the fetus only acquires full legal protection when it is born and has a separate existence from its mother.2 This is the so called ''liveborn'' principle.”
What the sources say
- Not matchedcites [2] Paton v Trustees of BPAS [1979] QB 276, [1978] 2 All ER 987 (QBD) .
Couldn’t be matched to a paper in Crossref, so it can’t be checked.
plainstates a cause- Asserted: passes — The authors put it forward as true.
- Checkable: passes — It can be checked against evidence.
- Load-bearing: passes — The paper’s conclusions depend on it.
- Based: passes — The paper gives a reason why it holds.
- Not matched
- Probably not a substantial claim. 77
- It may state two separate claims as one. 33
Create a free account to see these claims.
Create a free account to see these assumptions.
14 more claims
Create a free account to see all 101 claims and every source verdict.
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.
Rated minor: it would not touch a result — a value no result rests on, a p-value that stays on the same side of the significance level, or a conflict that is clerical, resolved elsewhere in the paper, or outside its own findings.
In the paper
§ CONCLUSION
“The court's reasoning is a good illustration of Canguilhem's observation that ''the abnormal, while logically second, is existentially first''.21”
§ References
“20. Canguilhem G. The normal and the pathological [trans Fawcett C R]. New York: Zone Books, 1991:243.”
Rated minor: it would not touch a result — a value no result rests on, a p-value that stays on the same side of the significance level, or a conflict that is clerical, resolved elsewhere in the paper, or outside its own findings.
In the paper
§ **
“In a commentary on this argument Davis claims that what is important is not just an unbroken history of being joined, but the sharing of a body.20”
§ References
“19. Davis JK. Commentary on Thomson's violinist and conjoined twins. Camb Q Healthc Ethics 1999;8:435-9. 20. Canguilhem G. The normal and the pathological [trans Fawcett C R]. New York: Zone Books, 1991:243.”
Rated minor: it would not touch a result — a value no result rests on, a p-value that stays on the same side of the significance level, or a conflict that is clerical, resolved elsewhere in the paper, or outside its own findings.
In the paper
§ THE WAY FORWARD
“Kenneth Himma explores this relationship in the case of hypothetical conjoined twins, known as Tom and Joe.19”
§ References
“18. Himma KE. Thomson's violinist and conjoined twins. Camb Q Healthc Ethics 1999;8:428-35. 19. Davis JK. Commentary on Thomson's violinist and conjoined twins. Camb Q Healthc Ethics 1999;8:435-9.”
Citations
Cites
Purity and Danger: An Analysis of Concepts of Pollution and Taboo
McCormack, W., & Douglas, M. (1967) · Journal for the Scientific Study of Religion · doi:10.2307/1384077 · Cited by 5,738
Purity and Danger: An Analysis of Concepts of Pollution and Taboo.
Ardener, E., & Douglas, M. (1967) · Man · doi:10.2307/2798681 · Cited by 2,824
The Normal and the Pathological
Kaye, H. L., Canguilhem, G., Fawcett, C. R., & Cohen, R. S. (1990) · The Journal of Interdisciplinary History · doi:10.2307/204931 · Cited by 1,595
Foot, P. (2001) · doi:10.1093/0198235089.001.0001 · Cited by 1,356
Language, thought and other Biological Categories: New Foundations for Realism.
Rosenberg, J. F., & Millikan, R. G. (1987) · Noûs · doi:10.2307/2215193 · Cited by 607
On the Moral and Legal Status of Abortion
Warren, M. A. (1973) · The Monist · doi:10.5840/monist197357133 · Cited by 604
Ethics in Practice: An Anthology
LaFollette, H. (2020) · Cited by 121
An Almost Absolute Value in History
Noonan, J. T. (1970) · Harvard University Press eBooks · doi:10.4159/harvard.9780674183032.c2 · Cited by 101
Brandt, R. B. (1972) · The Monist · doi:10.5840/monist197256430 · Cited by 83
Dreger, A. (1998) · Studies in History and Philosophy of Science Part C Studies in History and Philosophy of Biological and Biomedical Sciences · doi:10.1016/s1369-8486(98)00002-8 · Cited by 31
Psychological Profiles of Conjoined Twins: Heredity, Environment, and Identity
Smith, J. D. (1988) · Medical Entomology and Zoology · Cited by 12
The Case of Conjoined Twins: Embodiment, Individuality, and Dependence
Kaveny, M. C. (2001) · Theological Studies · doi:10.1177/004056390106200404 · Cited by 10
Thomson's Violinist and Conjoined Twins
Himma, K. E. (1999) · Cambridge Quarterly of Healthcare Ethics · doi:10.1017/s0963180199004041 · Cited by 7
Davis, J. K. (1999) · Cambridge Quarterly of Healthcare Ethics · doi:10.1017/s0963180199214041 · Cited by 3
Stein, R. C. (2000) · Journal of Pastoral Care · doi:10.1177/002234090005400411 · Cited by 2
Commentary on Thomson's violinist and conjoined twins.
Davis, J. K. (1999) · PubMed · Cited by 1
Research works printed but not linked: 3
- Singer P . Practical ethics. [2nd ed]. Cambridge: Cambridge University Press, 1993, ch 4.
- 1982, Nat Hist, 91, 18
- 1971, Philos Public Aff, 1, 47
Cited by
Conjoined twins—past, present, and future
Rabeeah, A. A. A. (2006) · Journal of Pediatric Surgery · doi:10.1016/j.jpedsurg.2005.12.045 · Cited by 70
Vaginal Delivery of Dicephalic Parapagus Conjoined Twins: Case Report and Literature Review
Harma, M. I., Harma, M., Mil, Z., et al. (2005) · The Tohoku Journal of Experimental Medicine · doi:10.1620/tjem.205.179 · Cited by 42
“Sacrifice of one individual to save another is supported by most religions and by courts, although some ethicists disagree with assumptions made in legal analyses (Atkinson 2004; Bratton and Chetwynd 2004 ).”
BackgroundInfluentialAnaesthesia for conjoined twins
Thomas, J. (2004) · Child s Nervous System · doi:10.1007/s00381-004-0980-9 · Cited by 27
Three-dimensional ultrasound for prenatal assessment of conjoined twins: additional advantages?
Wataganara, T., Ruangvutilert, P., Sunsaneevithayakul, P., et al. (2017) · Journal of Perinatal Medicine · doi:10.1515/jpm-2016-0381 · Cited by 15
“Significant ethical and legal arguments have consistently been raised when it comes to prenatal management and postnatal surgical separation [4].”
BackgroundGêmeos unidos e autorização judicial para o aborto
Nomura, R. M. Y., Brizot, M. D. L., Liao, A. W., et al. (2011) · Revista da Associação Médica Brasileira · doi:10.1590/s0104-42302011000200020 · Cited by 11
“IG no diagnóstico, semanas, mediana (mín-máx) 20 (14-32) 24 (22-26) 0,050”
Influential
Metadata
- Authors
- Bratton, M. Q., & Chetwynd, S. B.
- Affiliations
- University of Warwick (GB)
- Corresponding author
- Bratton, M Q
- Venue
- Journal of Medical Ethics
- Publisher
- BMJ
- Published
- 2004-06
- Volume
- 30
- Issue
- 3
- Pages
- 279-285
- ISSN
- 0306-6800 (ISSN-L)
- 1473-4257
- PMC
- PMC1733862
- OpenAlex
- W2096742274
- Semantic Scholar
- 55215a25a3aaaefa092aa4aa01c17de28725bddb
- Cited by
- 27
- References
- 16
- Citations by year
- 2025: 1 · 2024: 2 · 2022: 2 · 2020: 1 · 2017: 3 · 2016: 2 · 2012: 3
- FWCI
- 1.86
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Medical Ethics (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- DigitalGeorgetown (Georgetown University Library) (submittedVersion)
- Funders
- Goddard Space Flight Center
- Topics
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Ethics and Legal Issues in Pediatric Healthcare
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Ethics and bioethics in healthcare
- Social Sciences › Law › Medical and Health Sciences Research
- Keywords
- conjoined twins, separation surgery, individuality, essentialism, best interests, individual sovereignty, bodily integrity, twin identity, legal personality
- MeSH terms
- Child, Child Advocacy, Child, Preschool, Ethics, Medical, Female, United Kingdom, Homicide, Humans, Legislation, Medical, Surgical Procedures, Operative, Twins, Conjoined, Bioethical Issues, Ethical Analysis, Personhood
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.
A language model drew the claims from the paper on 2026-10-11, under version 3 of the claim definition (model deepseek-v4.1-flash, prompt extract-v3).
A second model labelled each claim on 2026-10-11 (model jev-1.13-20260917, definition revision gold-guideline-v0.2).
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.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review