Brain states matter. A reply to the unfolding argument.
Abstract
Recently, it has been claimed that Integrated Information Theory and other theories of its type cannot explain consciousness ("unfolding argument"). We unravel this argument mathematically and prove that the premises of the argument imply a much stronger result according to which the observed problem holds for almost all theories of consciousness. We find, however, that one of the premises is unwarranted and show that if this premise is dropped, the argument ceases to work. Thus our results show that the claim of the unfolding argument cannot be considered valid. The premise in question is that measures of brain activity cannot be used in an empirical test of theories of consciousness.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
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?
Global Workspace Theory is not subject to the unfolding argument because broadcasting is a general concept that can be implemented in many different ways.
“GWT is not subject to the unfolding argument because broadcasting is a general concept, which can be implemented in many di ff erent ways (even though GWT is usually framed in recurrent terms, recurrence is not essential, Doerig, Schurger, et al., 2019; but see Kleiner, 2019; Kleiner & Hoel, 2020).”
From Hard criteria for empirical theories of consciousness (2021) · cites this paper as Kleiner, 2019
The unfolding argument does not apply to PPT because predictive processing can be unfolded.
“The unfolding argument does not apply, because predictive processing can be unfolded (Doerig, Schurger, et al. (2019); but see Kleiner (2019) and Kleiner and Hoel (2020)).”
From Hard criteria for empirical theories of consciousness (2021) · cites this paper as Kleiner (2019)
Cites
The Methodology of Scientific Research Programmes: Philosophical Papers
Lakatos, I. (1978) · doi:10.1017/cbo9780511621123 · Cited by 3,045 · see citing works
Towards a cognitive neuroscience of consciousness: basic evidence and a workspace framework
Dehaene, S. (2001) · Cognition · doi:10.1016/s0010-0277(00)00123-2 · Cited by 2,498 · see citing works
Methodology of Scientific Research Programmes
(1998) · Edward Elgar Publishing eBooks · doi:10.4337/9781781954249.00075 · Cited by 1,817 · see citing works
A neuronal model of a global workspace in effortful cognitive tasks
Dehaene, S., Kerszberg, M., & Changeux, J.-P. (1998) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.95.24.14529 · Cited by 1,347 · see citing works
Towards a true neural stance on consciousness
Lamme, V. A. F. (2006) · Trends in Cognitive Sciences · doi:10.1016/j.tics.2006.09.001 · Cited by 1,149 · see citing works
Block, N. (1981) · The Philosophical Review · doi:10.2307/2184371 · Cited by 562 · see citing works
Consciousness and Complexity during Unresponsiveness Induced by Propofol, Xenon, and Ketamine
Sarasso, S., Boly, M., Napolitani, M., Gosseries, O., Charland-Verville, V., Casarotto, S., Rosanova, M., Casali, A. G., Brichant, J.-F., Boveroux, P., et al. (2015) · Current Biology · doi:10.1016/j.cub.2015.10.014 · Cited by 399 · see citing works
Dehaene, S., Changeux, J.-P., & Naccache, L. (2011) · Research and Perspectives in Neurosciences · doi:10.1007/978-3-642-18015-6_4 · Cited by 209 · see citing works
The unfolding argument: Why IIT and other causal structure theories cannot explain consciousness
Doerig, A., Schurger, A., Hess, K., & Herzog, M. H. (2019) · Consciousness and Cognition · doi:10.1016/j.concog.2019.04.002 · Cited by 140 · see citing works
PyPhi: A toolbox for integrated information theory
Mayner, W. G. P., Marshall, W., Albantakis, L., Findlay, G., Marchman, R., & Tononi, G. (2018) · PLOS Computational Biology · doi:10.1371/journal.pcbi.1006343 · Cited by 118 · see citing works
The Oxford Companion to Consciousness
Bayne, T., Cleeremans, A., & Wilken, P. (2009) · Oxford University Press eBooks · doi:10.1093/acref/9780198569510.001.0001 · Cited by 116 · see citing works
Kim, H., Hudetz, A. G., Lee, J., Mashour, G. A., Lee, U., & the ReCCognition Study Group (2018) · Frontiers in Human Neuroscience · doi:10.3389/fnhum.2018.00042 · Cited by 82 · see citing works
Seth, A. K. (2007) · Scholarpedia · doi:10.4249/scholarpedia.1328 · Cited by 80 · see citing works
The Oxford Companion to Consciousness
Guha, M. (2010) · Reference Reviews · doi:10.1108/09504121011057635 · Cited by 67 · see citing works
On the dangers of conflating strong and weak versions of a theory of consciousness
Lau, H. C., & Michel, M. (2020) · Philosophy and the Mind Sciences · doi:10.33735/phimisci.2020.ii.54 · Cited by 52 · see citing works
Falsification and consciousness
Kleiner, J., & Hoel, E. (2021) · Neuroscience of Consciousness · doi:10.1093/nc/niab001 · Cited by 46 · see citing works
Self-citationIntegrated information and state differentiation
Marshall, W., Gomez-Ramirez, J., & Tononi, G. (2016) · Frontiers in Psychology · doi:10.3389/fpsyg.2016.00926 · Cited by 36 · see citing works
Tsuchiya, N., Andrillon, T., & Haun, A. (2019) · doi:10.31234/osf.io/a2ms9 · Cited by 11 · see citing works
Integrated Information Theory and Isomorphic Feed-Forward Philosophical Zombies
Hanson, J. R., & Walker, S. I. (2019) · Entropy · doi:10.3390/e21111073 · Cited by 9 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Hard criteria for empirical theories of consciousness
Doerig, A., Schurger, A., & Herzog, M. H. (2021) · Cognitive Neuroscience · doi:10.1080/17588928.2020.1772214 · Cited by 194 · see citing works
“The unfolding argument does not apply, because predictive processing can be unfolded (Doerig, Schurger, et al. (2019); but see Kleiner (2019) and Kleiner and Hoel (2020)).”
BackgroundInfluentialTime consciousness: the missing link in theories of consciousness
Kent, L., & Wittmann, M. (2021) · Neuroscience of Consciousness · doi:10.1093/nc/niab011 · Cited by 71 · see citing works
Blum, L., & Blum, M. (2022) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2115934119 · Cited by 70 · see citing works
Tsuchiya, N., Andrillon, T., & Haun, A. (2020) · Consciousness and Cognition · doi:10.1016/j.concog.2020.102877 · Cited by 52 · see citing works
Falsification and consciousness
Kleiner, J., & Hoel, E. (2021) · Neuroscience of Consciousness · doi:10.1093/nc/niab001 · Cited by 46 · see citing works
Self-citationTowards a structural turn in consciousness science
Kleiner, J. (2024) · Consciousness and Cognition · doi:10.1016/j.concog.2024.103653 · Cited by 27 · see citing works
Self-citationTowards new concepts for a biological neuroscience of consciousness
Signorelli, C. M., & Meling, D. (2021) · Cognitive Neurodynamics · doi:10.1007/s11571-020-09658-7 · Cited by 17 · see citing works
Guerrero, L. E., Castillo, L., Arango‐López, J., & Moreira, F. (2023) · Neural Computing and Applications · doi:10.1007/s00521-023-08328-z · Cited by 17 · see citing works
First-person experience cannot rescue causal structure theories from the unfolding argument
Herzog, M. H., Schurger, A., & Doerig, A. (2022) · Consciousness and Cognition · doi:10.1016/j.concog.2021.103261 · Cited by 14 · see citing works
What is a mathematical structure of conscious experience?
Kleiner, J., & Ludwig, T. (2024) · Synthese · doi:10.1007/s11229-024-04503-4 · Cited by 9 · see citing works
Self-citationWhen philosophical nuance matters: safeguarding consciousness research from restrictive assumptions
Usher, M., Negro, N., Jacobson, H., & Tsuchiya, N. (2023) · Frontiers in Psychology · doi:10.3389/fpsyg.2023.1306023 · Cited by 8 · see citing works
A bibliometric evaluation of the impact of theories of consciousness in academia and on social media
Yeung, A. W. K., Cushing, C. A., & Lee, A. (2022) · Consciousness and Cognition · doi:10.1016/j.concog.2022.103296 · Cited by 8 · see citing works
What is a Mathematical Structure of Conscious Experience?Preprint
Kleiner, J., & Ludwig, T. (2023) · doi:10.31234/osf.io/yhn8q · Cited by 6 · see citing works
Self-citationThe fundamental challenge of a future theory of consciousness
Ruan, Z. (2023) · Frontiers in Psychology · doi:10.3389/fpsyg.2022.1029105 · Cited by 3 · see citing works
Three Comments in Case of a Structural Turn in Consciousness SciencePreprint
Kleiner, J. (2023) · SSRN Electronic Journal · doi:10.31234/osf.io/qmyv5
Self-citationSchmid, G. B. (2025) · Springer eBooks · doi:10.1007/978-3-662-70831-6_2
Functionalist theories of mind: unfolding, substitution and the indeterminacy of functionPreprint
Basri, J., BarAvi, P., & Hemmo, M. (2025) · SSRN Electronic Journal · doi:10.2139/ssrn.5867565
Can consciousness be explained?
Rakover, S. S. (2026) · Advances in consciousness research · doi:10.1075/aicr.96.c02
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.refs
Methodological Dualism (MD) and the Multi-Explanation Framework (MEF) (II)
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c05
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c01
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.toc
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.prelim
Could a sophisticated robot develop consciousness?
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c08
Is psychology a science, and how does it advance?
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c09
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.ai
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.ack
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.ded
Rakover, S. S. (2026) · Advances in consciousness research · doi:10.1075/aicr.96
Methodological Dualism (MD) and the Multi-Explanation Framework (MEF) (I)
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c04
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.si
A theoretical outline for explanatory consciousness (TOEC)
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c07
Why have explanations of consciousness failed?
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c03
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.preface
New perspectives on consciousness
(2026) · Advances in consciousness research · doi:10.1075/aicr.96.c06
Basri, J., BarAvi, P., & Hemmo, M. (2026) · Consciousness and Cognition · doi:10.1016/j.concog.2026.104121
Beyond Cortical Signatures: Measurement Gaps Across Theories of Consciousness
Svet, M., & Arachchige, A. S. P. M. (2026) · Brain Sciences · doi:10.3390/brainsci16101087
- Authors
- Kleiner, J.
- Affiliations
- Ludwig-Maximilians-Universität München (DE)
- Corresponding author
- Kleiner, Johannes
- ORCID
- Kleiner, Johannes
- Venue
- Consciousness and Cognition
- Publisher
- Center for Open Science
- Published
- 2019-07-17
- Volume
- 85
- Pages
- 102981-102981
- ISSN
- 1053-8100 (ISSN-L)
- OpenAlex
- W3088997805
- Cited by
- 37
- References
- 18
- Citations by year
- 2026: 20 · 2025: 2 · 2024: 2 · 2023: 5 · 2022: 3 · 2021: 3 · 2020: 2
- FWCI
- 3.14
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Consciousness and Cognition (publishedVersion)
- PubMed (publishedVersion)
- PsyArXiv (OSF Preprints) (submittedVersion)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Philosophy and Theoretical Science
- Social Sciences › Arts and Humanities › History and Philosophy of Science › Philosophy and History of Science
- Life Sciences › Neuroscience › Cognitive Neuroscience › Embodied and Extended Cognition
- Keywords
- integrated information theory, theory of consciousness, consciousness, brain states
- MeSH terms
- Brain, Consciousness, Humans
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.
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