On the distinction between beables and qualia

Adam Brownstein

REVIEW 4 major objections 5 minor 3 references

On the distinction between beables and qualia

T0 review · 4 major / 5 minor · reviewed 2026-08-08 · deepseek-v4-flash

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Pith's one-line read This paper claims that beables and qualia must exist together, reframing the hard problem of consciousness.

desk verdict This is a philosophically interesting but logically circular essay whose central forward argument rests on a false reading of what beables do in dBB, so the mutual-necessity thesis is not established. read the letter →

arxiv 2502.07705 v1 pith:YAG5MEVY submitted 2025-02-11 physics.hist-ph quant-ph

Adam Brownstein This is my paper · ORCID

classification physics.hist-phquant-ph

keywords deBroglie-BohminterpretationbeablesqualiahardproblemofconsciousnessMany-WorldsBornruleprobabilitiesLeibniz'sprinciplesufficientreasonphilosophicalzombie

verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

The paper argues that the de Broglie-Bohm interpretation and subjective experience (qualia) require each other. Beables—the particle configurations that accompany the wavefunction in that interpretation—are not qualia, but they give qualia something continuous to attach to, so that experience follows the Born-rule probabilities across time. Conversely, without qualia the beables would add no information beyond the wavefunction and would be a purposeless redundancy, which Leibniz's principle of sufficient reason would rule out. The resulting circularity is presented as a feature, not a flaw, because it lets the hard problem of consciousness be inverted: instead of explaining why qualia exist, one can ask why beables exist.

What carries the argument

The load-bearing machinery is the reciprocal pair of concepts 'beable' and 'qualia' together with a circular inference. Beables are the definite particle configurations of de Broglie-Bohm theory; qualia are first-person experiences, the 'what it's like to be' something. The forward argument uses the Many-Worlds probability problem: wavefunction branches are unconstrained by Born-rule weights, so qualia attached to branches would mostly land in non-typical, unstable worlds, whereas beables provide a continuous trajectory that respects the Born rule. The reverse argument uses Leibniz's principle of sufficient reason: because beables add no information beyond the wavefunction, they need qualia to give them a purpose. The circularity itself is the mechanism, since any linear chain of explanation would terminate in the anthropic brute fact.

What would settle it

The central claim would be falsified by a derivation of Born-rule statistics from the wavefunction alone, with no guiding configuration, or by a demonstration that a de Broglie-Bohm trajectory carries information the wavefunction does not; either would remove the redundancy argument. It would also be falsified by a consistent scheme that attaches qualia to wavefunction branches and preserves Born-rule probabilities across time.

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Extended reading notes

Core claim

The paper's central claim is a reflexive entailment: beables require qualia for their existence, and qualia require beables for their existence. The forward direction says qualia cannot be attached directly to wavefunction branches because most branches violate Born-rule statistics and are unstable, so a guiding particle configuration is needed to carry experience across time. The reverse direction says the particle configuration is informationally redundant next to the wavefunction, so in a qualia-free world it would be an epiphenomenon; Leibniz's principle of sufficient reason then forbids it. The paper does not claim to solve the hard problem by finding a material basis for qualia; it claims to relocate the problem, making qualia a necessary non-material addition to a beable-based world and beables a necessary structure for qualia.

Load-bearing premise

The load-bearing premise is that beables add no information beyond the wavefunction, so a beable world without qualia would be a purposeless redundancy; if a trajectory or branch selection supplies something the wavefunction alone lacks, the necessity of qualia for beables breaks down.

Editorial extensions

If this is right

If beables require qualia, a de Broglie-Bohm universe without conscious experience is ruled out; any complete version of the interpretation would have to include subjective experience among its ontology.
If qualia require beables, subjective experience cannot reside directly on wavefunction branches, because the continuous satisfaction of Born-rule probabilities across time demands a guiding particle configuration.
The hard problem of consciousness is inverted: the unexplained brute fact shifts from qualia to beables, and qualia become a necessary non-material addition that makes the beables non-redundant.
The time coordinate is conjectured to belong to the same non-material category as qualia, so the paper's three-way split of material, non-material, and platonic would apply to time rather than placing it in the mathematical realm.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

Editorial extension: the circular argument could be made testable by comparing the statistical distribution of observers across decoherent branches in Many-Worlds with the Born-rule weighting; a mismatch would support the need for a beable-like selector.
Editorial extension: if beables are needed for qualia, then any theory that replaces de Broglie-Bohm with a different trajectory or hidden-variable structure that also satisfies continuity and Born-rule probabilities would serve the same role, so the argument generalizes to a class of beable-like theories, not just de Broglie-Bohm.
Editorial extension: taking time as qualia-like suggests that relational or global quantities such as proper time and curvature might be reclassified as non-material; this could connect to research on relational physics, though the paper does not develop that link.

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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Desk Editor's Note

read the letter

The paper's reflexive framing—that Bohmian beables and qualia support each other's existence—is genuinely novel and could be a useful hook for discussing the hard problem of consciousness in the context of quantum mechanics. I credit the author for clearly stating what dBB does not do (solve the hard problem) and for pointing to the Many-Worlds probability problem as a real motivation for adding beables. The distinction between beables and qualia is also drawn carefully, and the paper is honest enough to admit its own circularity.

But the central forward argument collapses on inspection. The claim that beables are redundant because they carry the same information as the wavefunction is simply false for standard dBB. The wavefunction Ψ(q,t) is a function on configuration space; it does not select the actual configuration Q(t). Initial positions are independent degrees of freedom. Given the same Ψ at all times, there are infinitely many trajectories Q(t) consistent with the guidance equation. The beables provide exactly the information needed to pick out one decohered branch and define measurement outcomes—that is what solves the measurement problem. So Leibnizian parsimony cannot motivate adding qualia to justify redundancy that does not exist. The reverse argument is also unsupported: it assumes qualia need a physical bearer and that only beables satisfy the two stated conditions, but neither premise is defended. The paper concedes circularity, and that is a structural defect, not a feature.

The off-shell branches claim in Section 2 is asserted without calculation or citation, and the anthropic argument for qualia is a brute-fact appeal rather than an argument. Still, some individual observations are reasonable—dBB does not explain qualia, and the Many-Worlds probability problem is a genuine issue that deserves discussion. The paper is a coherent speculative essay, but its load-bearing premise is false and the central thesis is not established.

For a reader who wants to see a creative attempt to connect beables and consciousness, this is worth a skim. For a serious philosopher of physics, the flaws are too central. I would not cite it as a substantive result, and I would not send it to peer review in its current form. It might be a starting point for a debate, but it needs major rework before it can carry the weight it claims.

Referee Report

4 major / 5 minor

Summary. The paper argues for a reflexive two-way relationship between the beables of the de Broglie-Bohm (dBB) interpretation and qualia. The forward argument claims that without qualia, the dBB particle configuration would be informationally redundant relative to the wavefunction, so Leibniz's principle of sufficient reason would rule it out; hence qualia are necessary for the dBB interpretation. The reverse argument claims that qualia require a physical bearer with continuous identity across time and Born-rule probability reproduction, which only dBB beables (or similar theories) provide; hence the dBB interpretation is necessary for qualia. The paper concludes that this mutual necessity reframes the hard problem of consciousness, allowing the explanatory burden to be shifted onto beables. It also briefly proposes that the time coordinate may belong to the same non-material category as qualia.

Significance. If the central thesis were established, it would offer a genuinely novel perspective on the hard problem of consciousness, tying it to a specific interpretation of quantum mechanics. The paper is clearly written and shows awareness of relevant conceptual distinctions (beables vs. qualia, material vs. non-material). However, the thesis rests on two load-bearing assumptions that are not defended: the factual claim that dBB beables add no information beyond the wavefunction, and the methodological claim that a circular mutual-support argument can carry explanatory weight. Because the first premise is false in standard dBB, and because the paper explicitly concedes its argument is circular, the central claim is not supported. The paper also contains several unsupported physical assertions (e.g., about 'off-shell' branches) that are presented as if they were established. The result is a stimulating essay but not a sound contribution to the literature.

major comments (4)

[Section 3, Forward argument] The premise that the dBB particle configuration is redundant because 'the information it contains is the same as the information contained in the wavefunction' is false in standard dBB. The wavefunction Ψ(q,t) is defined on configuration space and does not select a particular configuration Q(t); initial positions are independent degrees of freedom, and infinitely many trajectories satisfy the guidance equation for a given wavefunction. The beables supply exactly the information needed to pick out one branch of a decohered wavefunction and to define actual measurement outcomes, which is what solves the measurement problem. Since the beables are not informationally redundant, the Leibnizian redundancy argument cannot motivate the necessity of qualia, and the forward direction of the central claim fails.
[Section 3, Inference 1] The paper explicitly states: 'The argument is circular, but perhaps this is a feature rather than a deficiency.' A circular argument cannot establish the existence of either beables or qualia; mutual support between two unproven premises provides no independent grounding for either. The paper offers no reason to treat this circularity as a virtue beyond the claim that any linear argument must terminate in anthropic brute facts. This is a load-bearing issue because the entire reflexive relationship is defined by this circularity, and the central conclusion that 'beables require qualia for their existence, and qualia require beables for their existence' is therefore not established.
[Section 2, Second missing link, and Section 3, Reverse argument] The reverse argument assumes that qualia must attach to a physical entity that (a) has consistent identity across time and (b) reproduces Born-rule probabilities across time, and then asserts that only dBB beables satisfy these conditions. The first assumption is not defended; one could imagine other candidate bearers (e.g., fields, spacetime events, or a novel ontology). The second assertion is supported by a critique of Many-Worlds that relies on the 'naive counting argument' and the claim that 'the majority of wavefunction branches are unstable worlds that contain off-shell behaviour.' This latter claim is made without calculation or citation and appears to mischaracterize the structure of decoherent branches. Without a rigorous demonstration that dBB beables are the unique satisfiers of (a) and (b), the reverse necessity claim is unsubstantiated.
[Section 3, Forward argument] The invocation of Leibniz's principle of sufficient reason is not sufficient to ground the forward argument. The principle is a metaphysical heuristic, not a physical law, and it is unclear why the universe should be required to avoid informational redundancy in the specific sense claimed. Moreover, many physical theories contain redundant descriptions (e.g., gauge symmetries, coordinate choices) without being deemed impossible. The paper does not explain why the alleged redundancy of beables would be a 'purposeless' redundancy that necessitates their nonexistence absent qualia. Thus, even if the informational-premise objection were waived, the leap from redundancy to non-existence is not justified.

minor comments (5)

[Section 2, first paragraph] There are formatting errors with missing spaces in the original text, such as 'Forinstance, ifweviewthebrainasabiologicalnetworkofneurons,' which should be corrected.
[Section 2, 'Are beables and qualia different things?'] The paper uses 'beables' and 'particle configuration' interchangeably, but in Bell's original terminology 'beables' can include both the wavefunction and the configuration. Clarifying the intended ontology would prevent confusion.
[Section 2, 'Reification and the properties of qualia'] The claim that qualia could be 'attached to the branches of the wavefunction' is vague and not defined with sufficient precision; it is unclear what it means for a quale to be attached to a branch.
[Section 4] The discussion of the time coordinate and the non-material world is speculative and appears disconnected from the main argument. If retained, it should be framed as a conjecture with an explicit relation to the beables-qualia relationship.
[References] The paper engages with only three references and does not situate its argument within the substantial existing literature on dBB, quantum mechanics and consciousness, or the hard problem. A more thorough engagement would strengthen the paper's scholarly context.

Circularity Check

2 steps flagged · score 8.0 of 10

Paper explicitly concedes that its reciprocal beables–qualia argument is circular; both directions reduce to the other's existence.

self definitional [Section 3, Inference 1]
"Then, why do qualia exist? Because we have the de Broglie-Bohm interpretation. Then, why does the de Broglie-Bohm interpretation exist? Because we have qualia. The argument is circular, but perhaps this is a feature rather than a deficiency; because any linear argument must terminate in the brute fact of the anthropic principle and thus will fail to provide an explanation for why."

The paper's central conclusion—'beables require qualia for their existence, and qualia require beables for their existence'—is produced by chaining two arguments whose conclusions serve as each other's premises. The forward argument needs qualia to make beables non-redundant, and the reverse argument needs beables to give qualia a bearer. Inference 1 explicitly states that the two existence questions answer each other and calls the resulting argument 'circular.' This is not an independent derivation; the reflexive relationship is the input of the argument, not its output.
self definitional [Section 3, Forward argument]
"However, the de Broglie-Bohm particle distribution would become redundant, because the information it contains is the same as the information contained in the wavefunction. It would be an epiphenomenon which serves no purpose. It is only by the existence of qualia and the experience of Born-rule probabilities that there is a necessity to explain these Born-rule probabilities in the first place."

This step stipulates that the beables add no information beyond the wavefunction. Under that stipulation, the only remaining function of the beables is to provide the qualitative Born-rule experience, so the necessity of qualia for the de Broglie-Bohm interpretation is already contained in the premise. The conclusion 'beables require qualia' therefore reduces to the definition of the beables as informationally redundant absent qualia, rather than being established by independent evidence. The appeal to Leibniz's principle of sufficient reason supplies normative force, but the content of the claim rests entirely on the stipulated redundancy.

full rationale

The paper's central claim is explicitly circular, and the paper says so. Section 3's Inference 1 builds the reciprocal relation by having 'why do qualia exist?' answered by 'because we have the de Broglie-Bohm interpretation' and 'why does the de Broglie-Bohm interpretation exist?' answered by 'because we have qualia,' then concedes 'The argument is circular.' The forward argument stipulates that the beables add no information beyond the wavefunction, making qualia necessary to give them purpose; that premise already contains the conclusion that beables require qualia. The reverse argument assumes qualia must be attached to a physical substance and that only beables satisfy continuity plus Born-rule probabilities; the conclusion that qualia require beables is then the same assumption under a different label. Together, the two directions are mutually supporting rather than independently derived. No self-citation is load-bearing: the references are Chalmers, Nagel, and Leibniz, external to the author. Because the central result reduces by construction to the mutual definition of beables and qualia, the circularity score is 8; a score of 10 would require the entire derivation to be a formal tautology, whereas the paper also contains independent (if speculative) discussion of Many-Worlds probabilities and time.

Assumptions & free parameters 0 free parameters · 5 assumptions · 1 invented entities

No numerical or fitted parameters appear in the paper. The argument depends on the five metaphysical axioms listed above, and on one invented realm, the non-material world, which has no independent evidence. These axioms are load-bearing for the mutual-necessity conclusion.

assumptions (5)

ad hoc to paper Leibniz's principle of sufficient reason: the universe should not contain purposeless redundancy.
Invoked in the Forward argument and Conclusions to rule out a beable configuration that duplicates wavefunction information.
domain assumption Qualia exist as a brute fact established by direct experience and the anthropic argument.
Used throughout (Section 'Do qualia exist?') as the starting point that something must attach to physical structure.
ad hoc to paper Qualia must attach to a physical entity with a continuous identity over time and must reproduce Born-rule probabilities over time.
The Reverse argument assumes qualia need this kind of support and that the Many-Worlds branch structure cannot provide it.
domain assumption The majority of Many-Worlds branches contain off-shell, unstable behavior under uniform branch counting.
Stated in Section 2, Second missing link, without derivation; it is used to reject attaching qualia to wavefunction branches.
domain assumption The beables add no information beyond the wavefunction.
Assumed in the Forward argument to make beables redundant in a qualia-free world; contested in the literature because the trajectory is an additional actual fact.

invented entities (1)

Non-material world
purpose: Provides a realm for qualia and proper time, distinct from platonic mathematical concepts, and is conjectured to be the embedding space for the physical material world (Section 4).
No falsifiable predictions are offered; it is a metaphysical postulate used to support the claim that time and qualia share the same status.

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Cite this review

Pith. "Pith review of On the distinction between beables and qualia." pith.science (2026). https://pith.science/paper/YAG5MEVY

@misc{pith2026250207705,
  author       = {Pith},
  title        = {Pith review of: On the distinction between beables and qualia},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/YAG5MEVY}},
  note         = {Machine review of arXiv:2502.07705}
}

read the original abstract

The link between the de Broglie-Bohm interpretation and the hard problem of consciousness is investigated. We highlight that beables of the de Broglie-Bohm interpretation are not themselves qualia, but are intimately related to qualia. It is then argued that qualia are necessary for the de Broglie-Bohm interpretation, and conversely the de Broglie-Bohm interpretation (or similar theories) are necessary for qualia. Therefore, there is a reflexive two-way relationship between the beables of the de Broglie-Bohm interpretation and qualia such that they support the existence of each other. By using this reflexive argument, the hard problem of consciousness can be addressed via an indirect route.

Discussion (0). Continue with ORCID to comment.

Reference graph

Works this paper leans on

3 extracted references · 1 canonical work pages

[1]

Chalmers, D. J. (1995). Facing up to the problem of consciousness. Journal of consciousness studies, 2(3), 200-219

1995
[2]

Nagel, T. (1980). What is it like to be a bat?. In The language and thought series (pp. 159-168). Harvard University Press

1980
[3]

Leibniz, G. W. (1989). The Monadology: 1714 (pp. 643-653). Springer Netherlands

work page 1989

Pith tools

Reviewed August 8, 2026 · model on record in the stance chip above.

[1] [1]

Chalmers, D. J. (1995). Facing up to the problem of consciousness. Journal of consciousness studies, 2(3), 200-219

1995

[2] [2]

Nagel, T. (1980). What is it like to be a bat?. In The language and thought series (pp. 159-168). Harvard University Press

1980

[3] [3]

Leibniz, G. W. (1989). The Monadology: 1714 (pp. 643-653). Springer Netherlands

work page 1989