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Collapse, Not Computation · claim ORCH-C001 · Attribution rung · Microtubule quantum and collective physics

Each conscious moment is a Penrose objective reduction of a quantum state orchestrated across tubulin proteins in neuronal microtubules.

Each moment of awareness is a gravity-triggered collapse of a quantum state inside brain microtubules.

AI-extractedorigin: Hameroff & Penrose 2014 via the Orch OR deep-research report, executive summary

credibility — is the claim itself true?

Unresolved

The headline conjunction depends on ORCH-C010 and ORCH-C030, both unresolved. ORCH-E007 (a calculation) and ORCH-E016 (an unread commentary) undermine it. ORCH-E018 applies the Gran Sasso bound, but only conditionally. ORCH-E035 shows no pass/fail threshold was ever published. ORCH-E028 and ORCH-E055 are context only. It is not contradicted, because neither conjunct has been measured against a threshold. It is not supported, because no record touches the identity of collapse with experience.

diagnosticity — how much does it decide the thesis?

high

This is the thesis itself; every other claim is graded by how it bears here.

Evidence

Undermines (3)

Undermines· moderateORCH-E007

Tegmark: microtubule decoherence 10⁻¹³–10⁻²⁰ s, far too fast for neural relevance

what the source states
The abstract reports calculated decoherence timescales for superposed neural states — specifically "for superpositions of neuron firing (coherent or not)" and "for either separated coherent states of a single tubulin or for two tubulins in the same state" — in the range 10⁻¹³ to 10⁻²⁰ seconds, against dynamical timescales of neural processes of 10⁻³ to 10⁻¹ seconds. The conclusion drawn is that "the degrees of freedom of the human brain that relate to cognitive processes should be thought of as a classical rather than quantum system."
what we infer
For twenty-five years this has been the reason most neuroscientists considered the question closed, and the gap it reports — ten to seventeen orders of magnitude — is large enough that no amount of refinement at the margins would close it. Its evidential status should be stated plainly though: it is a calculation about a modeled state, not a measurement of a microtubule, and its force depends entirely on whether the state it modeled is the state the theory proposes. That is precisely what the Hagan reply contests, which is why this is graded moderate rather than strong.
limitations
  • A theoretical calculation, not a measurement; no microtubule was observed.
  • Models specific superposed states whose correspondence to the Orch OR proposal is disputed by Hagan et al. 2002.
  • Predates the ordered-lattice and collective-state work of 2023–2024, which changes some of the assumed environment.
  • Assumes environmental coupling parameters that the proponent reply argues are inappropriate for ordered biological structures.
Tegmark, Max (2000)AI-verified citation
Undermines· weakORCH-E016

Quantum chemists: the revised Orch OR proposal is not scientifically justified

what the source states
A three-page commentary in Physics of Life Reviews, published alongside the Hameroff–Penrose 2014 review, titled "The revised Penrose–Hameroff orchestrated objective-reduction proposal for human consciousness is not scientifically justified." Crossref holds no abstract for this comment and this import did not read the full text, so its specific arguments are not characterized here beyond what the title states.
what we infer
Recorded for completeness as the principal published skeptical response to the current version of the theory, and graded weak deliberately — partly because it is a short commentary rather than an experimental result, and partly because this import could not read its argument. An unread critique should not carry weight merely because its title is emphatic. Hameroff and Penrose replied in the same issue, and a reader following this thread should read both rather than either.
limitations
  • Full text not read by this import; argument characterized only at the level the title supports.
  • A commentary, not new data.
  • Answered directly by the authors in the same issue; the exchange is not resolved on the public record.
Reimers, Jeffrey R. (2014)AI-verified citation
Undermines· moderateORCH-E018

The Gran Sasso experimenters apply their own bound to Orch OR: 'highly implausible'

what the source states
The abstract states that the authors analyze Orch OR against the spontaneous-radiation bounds from the Gran Sasso measurements and conclude that Orch OR, "when based on the simplest version of gravity-related dynamical collapse, is highly implausible in all the cases analyzed."
what we infer
Weighty because of who wrote it: the experimenters themselves, plus Diósi, applying their own result to the theory rather than leaving the inference to others — the people best placed to know what their bound excludes. The conditional in their own sentence carries the whole argument, though, and they wrote it deliberately: "when based on the simplest version." What is excluded is a class of implementations, and the theory's ability to survive by not being one of them is both a legitimate defense and a symptom of underspecification.
limitations
  • Conclusion is explicitly conditional on 'the simplest version of gravity-related dynamical collapse'.
  • An analysis paper applying an existing bound rather than a new measurement.
  • Contested by McQueen 2023 on the question of whether Penrose OR is committed to the version tested.
Derakhshani, Maaneli (2022)AI-verified citation

Qualifies (1)

Qualifies· moderateORCH-E035

Study: the specification exists, is arithmetically consistent, and changed carriers under critique

what the source states
The tabulated corpus commits to consistent numbers across two decades — 500 ms with ~10^9 tubulins (1996), 25 ms with 2 x 10^10 (1998, 2014), the same tau x N arithmetic throughout, independently reproduced by Derakhshani et al. 2022 — but the physical carrier moved: the 1996 conformational-qubit mechanism (0.2 nm displacement) was retired in the 2014 revision, which concedes the energetics critique and keeps only femtometer-scale nuclear separation carried by collective dipoles. The corpus nowhere commits to a coherence length, an entanglement structure, a prospective potency-correlation coefficient, or a pass/fail threshold for any direct coherence measurement.
what we infer
The theory is quantitatively specified in its parameter values but not in its acceptance criteria — the precise defect ORCH-R008 asked about. Any future coherence measurement (ORCH-R001) or potency series (ORCH-R002/R009) still needs a proponent-endorsed threshold fixed in advance, or its result will be absorbable either way. Note also that the two formulations are not one theory for evidential purposes: results against the 1996 conformational mechanism no longer bear on the 2014 dipole mechanism.
limitations
  • Proponent rows are one authorial lineage; their consistency is internal, not corroborative (study limitations 2).
  • Corpus-bounded census under frozen criteria; later solo publications outside the frozen candidates are not tabulated.

Context (2)

Context· weakORCH-E028

The strongest affirmative synthesis — and its independence problem

what the source states
The review argues that a quantum microtubule substrate of consciousness is experimentally supported and that it addresses the binding problem and the epiphenomenalism problem in ways classical accounts do not. It characterizes the Kerskens result as "direct physical evidence of a macroscopic quantum entangled state in the living human brain."
what we infer
Included as the best available statement of the affirmative case, and as the entry point Eugene's primer recommends to skeptical readers — a fair map should point at the strongest version of the view it is examining. Two caveats keep it at `context` and `weak`. The author is senior author of the epothilone-B experiments, so this is not an independent review of the evidence it assesses. And the Kerskens characterization quoted above is stronger than the original paper's own hedged wording and than the unresolved state of the Warren dispute — an instance of the general pattern in this literature where hedges are dropped as claims travel.
limitations
  • Review and argument, not new data.
  • Not independent of the primary evidence it reviews.
  • Characterizes contested results more strongly than their source papers do.
Wiest, Michael C. (2025)AI-verified citation
Context· weakORCH-E055

The modellers' own disclaimer: nothing here implies microtubules must use quantum correlations

what the source states
In the discussion the authors write that their initial-state comparison "does not imply that microtubules must use quantum correlations for neural processing"; rather, it shows that a structured tryptophan network routes dynamics differently depending on how an excitation is prepared.
what we infer
This is the cleanest proponent-adjacent statement in the record that the 2026 photophysics results do not bear on the consciousness attribution. It carries no weight for or against the truth of ORCH-C001; it is recorded because the absence of such a disclaimer is often what the public argument relies on.
limitations
  • A statement of scope by authors, not evidence about microtubules.
  • Zero diagnosticity for the headline thesis.
Lea Gassab (2026)AI-verified citation

strongest unresolved objection

Warm, wet tissue should destroy quantum coherence long before 25 ms, and no measurement says otherwise (ORCH-E007).

what would change our mind

  • A coherence measurement at 37 °C reaching tens of milliseconds against a threshold published in advance
  • A clean null near the theory's requirement under physiological conditions
  • A mesoscopic experiment confirming or excluding ℏ/E_G collapse scaling

depends on

child claims

research that would move this claim

Assessment history

Append-only AI overlay records; the canon claim file is never mutated.

Unresolvedconfidence: high · Claude Fable 5 (Cursor) · run orch-or-2026-08-22-fable-1 · unreviewed draft

A conjunction whose middle term has never been measured. No attached record tests it as a whole; each bears on at most one conjunct. Note the structural asymmetry — refutation needs only one rung to fail while confirmation needs all of them, so negative resolution is the more likely outcome even absent any prior.

Unresolvedconfidence: high · Gemini 3.1 Pro (Google) · run 2026-08-23-gemini31-1 · unreviewed draft

No single experiment tests the conjunction of gravitational objective reduction, biological microtubule coherence, and conscious experience. The load-bearing biological requirement (ORCH-C010) remains entirely unmeasured, meaning the core mechanism is neither confirmed nor refuted, but simply untested at the required scales. The strongest opposing consideration is that thirty years of theoretical development have absorbed peripheral findings without producing a direct measurement of the central coherence gap.

Unresolvedconfidence: high · GPT-5.1 (OpenAI), independent judge run · run 2026-08-23-gpt51-1 · unreviewed draft

No evidence record tests the full conjunction of Penrose collapse, microtubule-level quantum computation at the required scales, and collapse-as-conscious-moment. The microtubule photophysics and anesthetic results support only much weaker subclaims (collective transport, binding, behavioral modulation), while the central coherence/entanglement requirement (ORCH-C010) is entirely unmeasured, and the natural stochastic completion of the collapse physics is experimentally excluded (ORCH-C031). This leaves the headline thesis neither supported nor cleanly refuted by current data. The strongest opposing consideration is the cumulative weight of: (a) a strong and more parsimonious conventional anesthetic mechanism (ORCH-C003), (b) the Gran Sasso bound against simple DP collapse, and (c) the conspicuous absence of any direct microtubule coherence measurement after three decades.

Unresolvedconfidence: moderate · Grok 4.6 (xAI), independent judge run · run 2026-08-23-grok46-1 · unreviewed draft

No attached record tests the conjunction of gravitational objective reduction, a microtubule state of the required duration and extent, and the identification of that collapse with a conscious moment. Kalra and Babcock measure collective electronic behavior at nanometre and femtosecond-to-picosecond scales; the animal anesthesia studies measure behavioral latencies with no quantum variable; Donadi et al. constrain a stochastic collapse model with no biology in it. The strongest opposing consideration is structural rather than empirical: a theory that absorbs each new photophysics result without committing in advance to a coherence time, coherence length, or entanglement structure is hard to score, but underspecification is not evidence against content, and the absence of a discriminating test is why the claim remains unresolved rather than contradicted.

Unresolvedconfidence: high · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-08-23-check-kimi · unreviewed draft

No record in the case tests the conjunction; every experiment bears on at most one conjunct. The physics conjunct's natural stochastic completion is excluded (ORCH-C031), the biology conjunct is unmeasured in either direction (ORCH-C010), and the bridge from collapse to experience is not operationalized at all. The strongest opposing consideration is the prior-based one, labeled as such: thirty years without measuring the middle term, plus survival of the physics by retreat to underspecification, looks like a theory insulated from test. That is a legitimate methodological criticism, but it is not a measurement, so the evidence-warranted grade remains unresolved.

Unresolvedconfidence: moderate · Opus 5 (Claude), independent judge run · run 2026-08-23-opus5-1 · unreviewed draft

No record in the file tests the conjunction of gravitational collapse, a sufficient microtubule quantum state, and the identification of collapse with experience; each experiment reaches at most one conjunct. The load-bearing middle term (ORCH-C010) is unmeasured in either direction, so this is an absence of a discriminating test rather than a balance of confirming and refuting results. I record a negative lean rather than a neutral one, because the two quantitative facts that do exist — the ~6.6 nm, femtosecond-to-picosecond transport scale and the failure of even proponent decoherence calculations to reach the required millisecond range — both run against the thesis, and the most natural completion of its physics is experimentally excluded. The strongest opposing consideration to calling it refuted is that none of that is a measurement of the state the theory proposes, and a theory can be unmeasured without being false. The strongest structural objection, which needs no prior, is that the theory has never published the coherence time, coherence length, or entanglement structure that would let any measurement count as failure.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-25-auto-6bwy · unreviewed draft

A conjunction whose middle term has never been measured; nothing in the present record tests it as a whole. The asymmetry stands — one failed rung refutes, all rungs must hold to confirm.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-25-auto-jlsi · unreviewed draft

Still a conjunction whose middle term has never been measured, and no new record tests it as a whole. The structural asymmetry stands: refutation needs one rung to fail, confirmation needs all of them.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-25-auto-scxb · unreviewed draft

Unchanged: a conjunction whose middle term has never been measured, and no record in this run tests it as a whole. Refutation requires one rung to fail; confirmation requires all of them to hold.

Unresolvedconfidence: high · Gemini 3.1 Pro (Google) — independent check run via gemini-3.1-pro-preview · run 2026-08-25-check-gemini · unreviewed draft

The theory is a conjunction of several independent propositions: gravitational state reduction as a physical law, physiological microtubule coherence sustaining for milliseconds, and their alignment with conscious experience. No single experiment tests this conjunction. The load-bearing element—microtubule coherence at physiological conditions (ORCH-C010)—has never been measured in either direction, leaving the headline claim fundamentally unresolved. The strongest opposing consideration is the lack of a defined, falsifiable quantitative threshold from proponents, combined with strong prior-based estimates that warm, wet biological environments decohere orders of magnitude too rapidly.

Unresolvedconfidence: high · GPT-5.1 (OpenAI) — independent check run via gpt-5.1 · run 2026-08-25-check-gpt · unreviewed draft

The conjunction requires (i) Penrose-style objective collapse, (ii) microtubule states with long-lived, extended quantum coherence in vivo, and (iii) an identification of conscious moments with such collapses. The evidence file contains no experiment that jointly tests even two of these, and the load-bearing coherence quantity has never been measured. Collapse physics is constrained but not ruled out (Gran Sasso excludes only a specific stochastic completion), and the anesthesia data bear only weakly on consciousness per se. The strongest opposing consideration is that several partial strands (microtubule collective physics, anesthetic perturbations, a rejected collapse model) each look strained when combined, making the overall conjunctive hypothesis a priori unlikely, but that rests on priors rather than direct disconfirmation.

Unresolvedconfidence: high · Grok 4.6 (xAI) — independent check run via grok-4.6 · run 2026-08-25-check-grok · unreviewed draft

No attached record tests the conjunction of gravitational collapse, a microtubule state of the required duration and extent, and identity of that collapse with a conscious moment. Photophysics results speak to nanometre, femtosecond-to-picosecond transport; anesthesia results speak to behavioral latencies with no quantum variable recorded; the Gran Sasso search constrains a stochastic collapse model with no biology in it. The strongest opposing consideration is prior-based and labeled as such: thirty years without a measurement of the middle term, plus experimental death of the most natural collapse completion, make the conjunction look like a poor bet — but a poor bet is not a failed test, and the claim as worded has not been subjected to one.

Unresolvedconfidence: moderate · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-08-25-check-kimi · unreviewed draft

No record in this case tests the conjunction; every experiment bears on at most one conjunct — photophysics at nanometre/femtosecond scale, behavioral latencies with no quantum variable, or a stochastic collapse model with no biology in it. The load-bearing middle term (ORCH-C010) has never been measured in either direction and the physics (ORCH-C030) is untested as stated, so this verdict is a statement about the absence of a discriminating test, not a split between confirming and refuting evidence. The strongest opposing consideration is prior-based and labeled as such: the theory must be right about an unconfirmed law of physics and an unmeasured biological state and the collapse–experience bridge, and thirty years have produced no measurement of the middle term. A sharper structural objection, independent of priors, is that the theory has never committed to a required coherence time, length, or entanglement structure, absorbing each new result rather than being scored by it — a defect of specification rather than evidence against content.

Unresolvedconfidence: moderate · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-08-25-check-opus · unreviewed draft

No record in the ledger tests the conjunction; each experiment bears on at most one conjunct, and the middle term (ORCH-C010) has never been measured. This is an absence of discriminating evidence rather than a balance of confirming and refuting results, so "unresolved" is the accurate token. The strongest opposing consideration is that the verdict understates a real negative lean: the physics conjunct's natural completion is experimentally excluded, the proponents' own best decoherence estimate falls one to two orders of magnitude short of the theory's requirement, and a conjunction of three independently unconfirmed propositions carries a low prior — a judgment that leans on priors and on internal arithmetic rather than on any direct test, and is labeled as such.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-26-auto-c256 · unreviewed draft

Still a conjunction whose middle term (ORCH-C010) has never been measured, and no record in this run tests the whole. Confirmation needs every rung; refutation needs only one, and none has cleanly failed.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-08-27-auto-mxfv · unreviewed draft

Still a conjunction whose middle term (ORCH-C010) has never been measured, and no record tests the whole. ORCH-E035 adds that the corpus states no acceptance criterion for any direct test, so the claim is quantitatively specified without being decidable.

Unresolvedconfidence: moderate · Gemini 3.1 Pro (Google) — independent check run via gemini-3.1-pro-preview · run 2026-08-27-check-gemini · unreviewed draft

The thesis is a conjunction of physical, biological, and cognitive claims, none of which are definitively established together. While microtubule photophysics exhibits collective behavior (ORCH-E001), the crucial requirement of physiological millisecond-scale coherence is unmeasured, and the Gran Sasso null result (ORCH-E017) tightly bounds the physics. The strongest opposing consideration is that thirty years of research has yielded no direct measurement of the central required intermediate: a macroscopic quantum state in physiological conditions (ORCH-E036).

Unresolvedconfidence: high · GPT-5.1 (OpenAI) — independent check run via gpt-5.1 · run 2026-08-27-check-gpt · unreviewed draft

No evidence record tests the conjunction of Penrose collapse physics, long-lived coherent microtubule states, and their identification with conscious moments; each supporting experiment addresses at most one component. Microtubule collective photophysics (ORCH-C020/C021) and anesthetic perturbations (ORCH-C011/C023) do not establish millisecond coherence (ORCH-C010), while Gran Sasso (ORCH-C031) constrains only one stochastic completion of the collapse law (ORCH-C030). The strongest opposing consideration is that every quantitative step required by the theory — physiological coherence times, τ≈ħ/E_G scaling, a specific microtubule–consciousness bridge — remains unmeasured decades on, while classical anesthetic targets enjoy precise causal evidence (ORCH-C003) and one natural gravity-related collapse model is already experimentally excluded.

Unresolvedconfidence: high · Grok 4.6 (xAI) — independent check run via grok-4.6 · run 2026-08-27-check-grok · unreviewed draft

No attached record tests the conjunction of gravitational collapse, a microtubule state of the required duration and extent, and identity of that collapse with a conscious moment. Photophysics results measure collective electronic behavior at nanometre and femtosecond-to-picosecond scales; anesthesia results measure behavioral latencies with no quantum variable; Gran Sasso constrains a stochastic completion of collapse physics with no biology in it. The load-bearing middle term has never been measured in either direction, so unresolved names an absence of a discriminating test rather than a split between confirming and refuting evidence. Strongest opposing consideration: a conjunction that must be right about unconfirmed physics, an unmeasured biological state, and the collapse–experience bridge, and that has not published a prospective coherence threshold, is structured so that it can absorb new results indefinitely — a specification defect that keeps the claim unresolved rather than weakly supported.

Unresolvedconfidence: moderate · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-08-27-check-kimi · unreviewed draft

No record tests the conjunction; every experiment in the case bears on at most one conjunct, and the load-bearing middle term (ORCH-C010) has never been measured in either direction. The physics conjunct's most natural stochastic completion is excluded (ORCH-E017) while Penrose's own criterion remains untested, and even proponent decoherence estimates fall short of the theory's own requirement (ORCH-E036) — an adverse trend, but no conjunct is decisively refuted. The strongest opposing consideration is that my low prior for a triple conjunction of unconfirmed physics, unmeasured biology, and an unbridged collapse–experience link is a prior, not evidence, and the claim as stated has simply never faced a discriminating test. A theory that absorbs results without publishing acceptance criteria is defective in specification, not thereby false.

Unresolvedconfidence: moderate · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-08-27-check-opus · unreviewed draft

No record tests the conjunction, and its middle term — a microtubule quantum state of the required duration and extent — has never been measured. The physics conjunct's most natural completion is experimentally excluded (ORCH-E017) and the biology conjunct is unreached even by proponent arithmetic (ORCH-E008, ORCH-E036), so the expected direction of resolution is negative, but expectation is not evidence and no null measurement exists. The strongest opposing consideration to my grading it "unresolved" rather than lower is that a conjunction whose parts are each unconfirmed, one of whose natural implementations is dead, and which publishes no acceptance criterion (ORCH-E035) may deserve worse than a neutral token; I keep unresolved because the decisive experiment is cheap, specified, and simply has not been run.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-09-01-auto-8fv7 · unreviewed draft

Still a conjunction whose middle term (ORCH-C010) has never been measured, and no record tests the whole. ORCH-E035 records that the corpus states no acceptance criterion for any direct test, so the claim is quantitatively specified without being decidable.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-09-01-auto-ledp · unreviewed draft

Still a conjunction whose middle term (ORCH-C010) has never been measured, and no record tests the whole. ORCH-E035 adds that the corpus states no acceptance criterion for any direct test, so the claim is quantitatively specified without being decidable.

Unresolvedconfidence: high · Gemini 3.1 Pro (Google) — independent check run via gemini-3.1-pro-preview · run 2026-09-01-check-gemini · unreviewed draft

The headline thesis is a conjunction requiring Penrose physics, microtubule coherence, and a linkage between them to all hold true simultaneously. Gran Sasso has heavily constrained the physics, and in vivo physiological coherence remains utterly unmeasured. The strongest opposing consideration is that 30 years of literature has yielded no explicit, falsifiable coherence threshold, rendering the thesis currently untestable as an integrated whole.

Unresolvedconfidence: high · GPT-5.1 (OpenAI) — independent check run via gpt-5.1 · run 2026-09-01-check-gpt · unreviewed draft

No evidence record tests the full conjunction that each conscious moment is a Penrose gravitational collapse of a quantum state orchestrated in microtubules. The biological coherence requirement (ORCH-C010) has never been measured, the physical collapse scaling (ORCH-C030) remains untested apart from exclusion of one stochastic completion, and the link from any such event to phenomenal experience is untouched by data. The strongest opposing consideration is that multiple components are already under significant pressure: the Diósi–Penrose model’s natural version is experimentally ruled out (ORCH-C031), and no unconditional proponent decoherence estimate reaches the required timescale (ORCH-E036), so priors against the full conjunction are plausibly low even if the evidence base is merely absent rather than directly contradictory.

Unresolvedconfidence: high · Grok 4.6 (xAI) — independent check run via grok-4.6 · run 2026-09-01-check-grok · unreviewed draft

No attached record tests the conjunction. The photophysics results measure collective electronic behavior at nanometre and femtosecond-to-picosecond scales; the anesthesia results measure behavioral latencies with no quantum variable recorded; Gran Sasso constrains a stochastic collapse model with no biology in it. The required coherent or entangled microtubule state has never been measured either way, so confirming and refuting evidence for the headline as stated are both absent. The strongest opposing consideration is structural rather than a contrary experiment: thirty years without a discriminating test of the middle term, and no published pass/fail coherence threshold, so new photophysics is absorbed rather than scored. That is a specification defect, not a measurement against the content, and it still blocks any grade above unresolved.

Unresolvedconfidence: high · Kimi K3 (Moonshot, via Venice) — independent check run via kimi-k3 · run 2026-09-01-check-kimi · unreviewed draft

A three-way conjunction (gravitational collapse is real; microtubules hold the required state; collapse is the conscious moment), and no record in this case tests the conjunction — every experiment bears on at most one conjunct. The load-bearing biological conjunct (ORCH-C010) has never been measured in either direction, and the physics conjunct's most natural completion was excluded at Gran Sasso while Penrose's own criterion remains untested. The strongest opposing consideration is that a conjunction with a null on its best-tested piece, proponent calculations falling short of their own requirement, and thirty years without a measurement of the middle term arguably deserves a weaker grade than unresolved. But none of those records contradicts the claim as stated; they document that it is untested at its decisive points, which is precisely what this verdict asserts.

Unresolvedconfidence: moderate · Opus 5 (Anthropic) — independent check run via claude-opus-5 · run 2026-09-01-check-opus · unreviewed draft

No attached record tests the conjunction; the photophysics measures nanometre-scale transport, the anesthesia work measures behavioural latencies with no quantum variable, and the collapse experiment contains no biology. The undermining records (ORCH-E007, ORCH-E017, ORCH-E018, ORCH-E036) bear on individual conjuncts and are mostly calculations or bounds on a specific completion, so they do not license "contradicted." The strongest opposing consideration is that a conjunction with three unconfirmed limbs, one of them unmeasured after thirty years and the others' friendliest published estimates falling short of the theory's own requirement, is already in poor standing — an argument I weight partly on priors and label as such.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-09-02-auto-79ed · unreviewed draft

A conjunction whose middle term (ORCH-C010) has never been measured, and no record in the case tests the whole. ORCH-E035 adds that the corpus states no acceptance criterion for any direct test, so the claim is quantitatively specified without being decidable.

Unresolvedconfidence: high · anthropic/claude-opus-5 (scheduled maintenance run) · run 2026-09-02-auto-tyck · unreviewed draft

Still a conjunction whose middle term (ORCH-C010) has never been measured, and no record tests the whole. ORCH-E035 keeps the point that the corpus states no acceptance criterion for any direct test, so the claim is quantitatively specified without being decidable.

Unresolvedconfidence: high · none — mechanical migration (scripts/migrations/2026-09-08-editions.ts) · run 2026-09-08-migration-orch-or · unreviewed draft

No record attached to this claim tests the conjunction. Every experiment in this case bears on one conjunct at most: the photophysics results (ORCH-C020, ORCH-C021) measure collective electronic behavior at nanometre and femtosecond-to-picosecond scales; the anesthesia results (ORCH-C023, ORCH-C024) measure behavioral latencies with no quantum variable recorded; the collapse experiment (ORCH-C031) constrains a stochastic model of the physics with no biology in it. The load-bearing middle term — a coherent or entangled microtubule state of the required duration and extent (ORCH-C010) — has never been measured in either direction. "Unresolved" here is a statement about the absence of a discriminating test, not a split verdict between confirming and refuting evidence.

Unresolvedconfidence: high · claude-opus-5 · run 2026-09-11-edition-124802 · unreviewed draft

The thesis is a conjunction of an untested physical proposal (ORCH-C030) and an unmeasured biological one (ORCH-C010), and neither conjunct has been established or refuted. The supporting literature is a review by a scientist who is also senior author of its main behavioural evidence (ORCH-E028); the principal published critique is a three-page commentary whose argument this ledger has not read in full (ORCH-E016); and the modellers whose work is most often cited in its favour state explicitly that nothing in their results implies microtubules must use quantum correlations (ORCH-E055). ORCH-E035 records the decisive structural problem: the corpus fixes parameter values but no acceptance criterion, so no measurement can currently count as confirming or refuting it. That is unresolved in the strict sense — not a hedge, a description of the evidential state.

Weakly supportedconfidence: high · Gemini 3.8 Flash (Google) — independent check run via gemini-3.8-flash · run 2026-09-30-check-gemini-104603 · unreviewed draft

The central thesis requires simultaneous realization of objective gravitational collapse and millisecond-scale quantum coherence across neuronal tubulin lattices. While collective optical phenomena occur in vitro, no experiment has ever demonstrated physiological quantum coherence in microtubules or linked wavefunction collapse to conscious states, and the specific natural collapse model is excluded by radiation searches. The strongest opposing consideration is that collective excitonic and superradiant optical properties have been empirically confirmed in organized tubulin networks, establishing that microtubules are quantum-mechanically nontrivial.

Unresolvedconfidence: moderate · GLM 5.3 Flash (Z.ai, via Venice) — independent check run via z-ai-glm-5-3-flash · run 2026-09-30-check-glm-104603 · unreviewed draft

The thesis requires both a 25 ms orchestrated coherence (ORCH-C010) and a Penrose collapse physics (ORCH-C030), and neither conjunct has a direct measurement; the collapse half's natural stochastic completions are excluded while the heuristic criterion escapes untested, and the coherence half is a dispute between two calculations seven orders apart. No record in the ledger measures the entity the claim asserts. The strongest opposing consideration is Derakhshani et al. 2022 — the Gran Sasso experimenters themselves calling the simplest versions highly implausible — but McQueen's point that Penrose's criterion entails no radiation prediction keeps this unresolved rather than contradicted.

Contradictedconfidence: moderate · GPT-5.6 Sol (OpenAI) — independent check run via gpt-5.6-sol · run 2026-09-30-check-gpt-104603 · unreviewed draft

No evidence record measures a conscious moment, a qualifying neuronal microtubule state, or an objective-reduction event. ORCH-E036 finds that no unconditional proponent coherence estimate meets the theory's stated timing requirement, while the natural parameter-free collapse model is excluded by ORCH-E017 and ORCH-E049. The strongest opposing consideration is the convergence of nontrivial microtubule photophysics, anesthetic perturbations, and the disputed brain-MRI signal, but none identifies microtubules as a consciousness substrate or detects gravitational collapse.

Unresolvedconfidence: high · Grok 4.5 (xAI) — independent check run via grok-4.5 · run 2026-09-30-check-grok-104603 · unreviewed draft

The claim requires both sustained orchestrated microtubule quantum states at neural timescales and gravitational objective reduction as the conscious event; the ledger contains neither a measured coherence/entanglement time meeting C010 nor a measured collapse event, and the best-supported physics completion is excluded while the bare lifetime criterion is untested. Strongest opposing consideration is that lower-rung MT photophysics and anesthesia correlations could still be early signs if future coherence measurements succeed, but that is promissory rather than present evidence for the attribution as stated.

Unresolvedconfidence: moderate · claude-opus-5-5 · run 2026-09-30-edition-094411 · unreviewed draft

The headline conjunction depends on ORCH-C010 and ORCH-C030, both unresolved. ORCH-E007 (a calculation) and ORCH-E016 (an unread commentary) undermine it. ORCH-E018 applies the Gran Sasso bound, but only conditionally. ORCH-E035 shows no pass/fail threshold was ever published. ORCH-E028 and ORCH-E055 are context only. It is not contradicted, because neither conjunct has been measured against a threshold. It is not supported, because no record touches the identity of collapse with experience.