Quantum Measurement without Ontology

Richard Healey

arxiv: 2605.16101 · v1 · pith:ZVHMHPUWnew · submitted 2026-05-15 · 🪐 quant-ph · physics.hist-ph

Quantum Measurement without Ontology

Richard Healey This is my paper

Pith reviewed 2026-05-20 18:34 UTC · model grok-4.3

classification 🪐 quant-ph physics.hist-ph

keywords quantum measurementobjectivityno-go theoremsmethodological normsquantum ontologyscientific practicemeasurement outcomes

0 comments

The pith

Methodological norms in quantum practice establish the objectivity of measurement outcomes without ontology.

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

No-go theorems indicate that quantum measurements typically create recorded outcomes rather than reveal prior values of observables and that unitary quantum theory cannot represent or explain a unique outcome. The paper argues that methodological norms built into quantum physical practice nevertheless secure the objectivity of these unique outcomes. The same norms ground the objectivity of non-quantum features that scientists represent in their models. A sympathetic reader would care because this preserves the reliability of scientific results and representations in quantum contexts without first settling ontological disputes about the quantum state.

Core claim

Methodological norms inherent in quantum physical practice institute the objectivity, not only of unique recorded outcomes of quantum measurements, but also of non-quantum features of the world that physicists and other scientists take their models to represent, independently of any ontological account of the quantum state or of the measurement process itself.

What carries the argument

Methodological norms of quantum physical practice that enforce consistency and agreement on recorded outcomes and model representations.

If this is right

Recorded outcomes of quantum measurements can be treated as objective facts for further scientific use.
Non-quantum features retain objective status in the models employed by physicists and other scientists.
Quantum theory can support reliable predictions and representations without commitment to a specific ontology of the state.
No-go theorems no longer threaten the practical objectivity of measurement results once practice norms are taken into account.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

This approach could support a pragmatic stance toward quantum theory that prioritizes use over interpretation.
Similar practice-based norms might be examined in other domains where measurement or representation faces foundational difficulties.
Laboratory protocols could be studied to identify which specific norms perform the objectivity-securing work.

Load-bearing premise

That the methodological norms of quantum practice are sufficient to institute genuine objectivity of outcomes independently of any ontological account of the quantum state or measurement process.

What would settle it

An experimental or theoretical demonstration that consistent application of quantum practice norms still yields disagreement on a unique recorded outcome or on a represented non-quantum feature would falsify the central claim.

read the original abstract

Measurement is an important scientific activity. In most of science, including classical physics, is may be understood as a way of finding out about the physical world and representing the results numerically. No-go theorems show that measurement of quantum observables is not like that: the recorded outcome is typically created rather than revealed in a quantum measurement, in which case there is no objective fact about the observable's prior value. Other no-go theorems show that unitary quantum theory can generally neither explain nor even represent a unique recorded outcome, thereby threatening that outcome's objectivity. Methodological norms inherent in quantum physical practice nevertheless institute the objectivity, not only of unique recorded outcomes of quantum measurements, but also of non-quantum features of the world that physicists and other scientists take their models to represent.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Desk Editor's Note private letter to a colleague

Healey argues that methodological norms in quantum practice can secure objective outcomes and non-quantum features without any ontology for the state or measurement, though the independence from no-go theorems is asserted more than derived.

read the letter

The punchline is that this paper tries to keep quantum measurement objective by relying on the methodological norms already operating in physics practice, sidestepping the need for any ontology of the quantum state or the measurement process. What the paper does is connect the no-go theorems to this normative foundation. It points out that no-go results imply outcomes are created in measurement rather than revealing prior values, and that unitary dynamics alone cannot account for a unique recorded outcome. From there it argues that the norms inherent in how quantum experiments are designed, performed, and interpreted still establish objectivity for those outcomes as well as for the non-quantum aspects of the world that models represent. This builds on practice-based views in quantum foundations without introducing new formal machinery or data. The strength is in how directly it confronts the threats to objectivity from the no-go theorems. By accepting that measurement does not reveal pre-existing values and that theory does not select unique results, the paper focuses on what actually happens in scientific activity to recover objectivity. That keeps the discussion relevant to working physicists rather than purely abstract. On the soft side, the central step is showing that these norms can institute genuine objectivity without any ontological backing. The risk is that the norms might implicitly depend on assumptions about what counts as a valid measurement or representation, which could bring ontology back in through the back door. The abstract states the claim, but the paper needs to provide a clear account of how the norms achieve independence from the very things the no-go theorems undermine. This work is mainly for readers in quantum foundations and philosophy of physics who are interested in pragmatist or anti-realist approaches to interpretation. It offers little for those seeking mathematical innovations or experimental implications, but it could prompt useful discussion on the role of norms in securing scientific knowledge. I think it deserves serious peer review. The argument engages real issues in the field and presents a coherent alternative, so referees should have a chance to evaluate whether the normative move holds up under scrutiny.

Referee Report

1 major / 0 minor

Summary. The manuscript argues that no-go theorems establish quantum measurement outcomes as created rather than revealed and show that unitary quantum theory cannot represent unique outcomes, thereby threatening their objectivity; nevertheless, methodological norms inherent in quantum physical practice suffice to institute the objectivity of unique recorded outcomes and of non-quantum features that scientific models represent.

Significance. If the central argument can be made rigorous, the result would offer a practice-based route to objectivity in quantum mechanics that avoids ontological commitments about the quantum state or measurement process. This could meaningfully contribute to foundations discussions by grounding objectivity in norms already operative in quantum experiments rather than in any particular interpretation.

major comments (1)

[Abstract and positive account of methodological norms] The central 'nevertheless' move (abstract and the section developing the positive account of norms) asserts that methodological norms institute objectivity independently of ontology, yet provides no explicit derivation showing how these norms avoid dependence on implicit premises about what is being measured or represented. This independence is load-bearing for the main claim and must be demonstrated to separate the argument from the no-go threats cited earlier in the paper.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for the detailed and constructive report. The major comment correctly identifies that the independence of methodological norms from ontological premises is central to our argument and requires more explicit demonstration. We will revise the manuscript to address this.

read point-by-point responses

Referee: [Abstract and positive account of methodological norms] The central 'nevertheless' move (abstract and the section developing the positive account of norms) asserts that methodological norms institute objectivity independently of ontology, yet provides no explicit derivation showing how these norms avoid dependence on implicit premises about what is being measured or represented. This independence is load-bearing for the main claim and must be demonstrated to separate the argument from the no-go threats cited earlier in the paper.

Authors: We agree that an explicit derivation is needed to establish the claimed independence rigorously. In the revised manuscript we will add a dedicated subsection following the discussion of the no-go theorems. This subsection will derive the independence in three steps: (1) identify the relevant norms (standardized calibration procedures, requirements for repeatable recording protocols, and cross-checks against independent apparatus) as purely procedural constraints on laboratory practice; (2) show that these norms license assertions of unique recorded outcomes and of non-quantum features without invoking any representation of the quantum state or of a pre-existing value of the observable; and (3) verify that the derivation nowhere relies on premises that the no-go theorems rule out. The revised text will therefore separate the practice-based route to objectivity from the ontological threats discussed earlier. revision: yes

Circularity Check

0 steps flagged

No circularity: argument invokes methodological norms as independent facts of practice

full rationale

The paper presents a philosophical argument that methodological norms in quantum practice establish objectivity of outcomes and non-quantum features without ontology, citing no-go theorems only to set up the problem. No derivation reduces by construction to its inputs, no parameters are fitted then renamed as predictions, and no self-citation chain or ansatz is used to force the conclusion. The norms are treated as external to the ontological debate rather than defined in terms of the objectivity they are said to institute. The chain is self-contained as an interpretive claim grounded in observed scientific practice.

Axiom & Free-Parameter Ledger

0 free parameters · 2 axioms · 0 invented entities

The argument rests on the existence and applicability of certain no-go theorems and on the claim that methodological norms can confer objectivity without ontology. No free parameters or invented physical entities appear in the abstract.

axioms (2)

domain assumption No-go theorems correctly show that quantum measurement outcomes are created rather than revealed and that unitary evolution cannot select a unique outcome.
Invoked in the first two sentences of the abstract as the starting point that threatens objectivity.
ad hoc to paper Methodological norms in quantum practice are capable of instituting objectivity independently of any ontological description of the quantum state.
This is the load-bearing positive claim that resolves the tension created by the no-go theorems.

pith-pipeline@v0.9.0 · 5638 in / 1401 out tokens · 33264 ms · 2026-05-20T18:34:20.586987+00:00 · methodology

discussion (0)

Lean theorems connected to this paper

Citations machine-checked in the Pith Canon. Every link opens the source theorem in the public Lean library.

IndisputableMonolith/Foundation/RealityFromDistinction.lean reality_from_one_distinction unclear

?

unclear
Relation between the paper passage and the cited Recognition theorem.

Methodological norms inherent in quantum physical practice nevertheless institute the objectivity, not only of unique recorded outcomes of quantum measurements, but also of non-quantum features of the world
IndisputableMonolith/Foundation/AbsoluteFloorClosure.lean absolute_floor_iff_bare_distinguishability unclear

?

unclear
Relation between the paper passage and the cited Recognition theorem.

A competent measurement of a quantum observable gives rise to a physical event that one may be justified in claiming as its outcome. But that event is not a quantum beable

What do these tags mean?

matches: The paper's claim is directly supported by a theorem in the formal canon.
supports: The theorem supports part of the paper's argument, but the paper may add assumptions or extra steps.
extends: The paper goes beyond the formal theorem; the theorem is a base layer rather than the whole result.
uses: The paper appears to rely on the theorem as machinery.
contradicts: The paper's claim conflicts with a theorem or certificate in the canon.
unclear: Pith found a possible connection, but the passage is too broad, indirect, or ambiguous to say the theorem truly supports the claim.

Reference graph

Works this paper leans on

4 extracted references · 4 canonical work pages

[1]

Information is physical: Cross-perspective links in Relational Quantum Mechanics

Adlam, E. and Rovelli, C. 2023 “Information is physical: Cross-perspective links in Relational Quantum Mechanics”, Philosophy of Physics 1 (1), 1–19. Bell, J.S. 1989 “Against ‘measurement’”. In 62 Years of Uncertainty: Erice, 5–14 August

work page 2023
[2]

Perceptual Objectivity

Plenum Publishers. Brandom, R. 2000 Articulating Reasons: An Introduction to Inferentialism (Cambridge, MA: Harvard University Press). Burge, T. 2009 “Perceptual Objectivity”, Philosophical Review 118 (3). 285–324. Fine, A. 1982 “Joint distributions, quantum correlations, and commuting observables”, Journal of Mathematical Physics 23, 1306–10. Fuchs, C. 2...

work page 2000
[3]

A Subjectivist’s Guide to Objective Chance

Healey, R. 2026 Pragmatism Works: Essays on Quantum Theory, Science and Metaphysics. Oxford: Oxford University Press. Kochen, S. and Specker, E. 1967 The problem of hidden variables in quantum mechanics. Journal of Mathematics and Mechanics 17, 59-87. Lewis, D. 1980 “A Subjectivist’s Guide to Objective Chance”, in Jeffrey, R. C. (ed.) Studies in Inductive...

work page 2026
[4]

Assessing Relational Quantum Mechanics

A reply to Rovelli's response to our “Assessing Relational Quantum Mechanics” arXiv preprint arXiv:2107.05817 Ollivier, H., Poulin, D. and Zurek, W. (2004) "Objective properties from subjective quantum states: environment as a witness", Physical Review Letters 93, 220401. Riedel, T. forthcoming “Is quantum relativism untameable? Revenge Wigner arguments f...

work page arXiv 2004

[1] [1]

Information is physical: Cross-perspective links in Relational Quantum Mechanics

Adlam, E. and Rovelli, C. 2023 “Information is physical: Cross-perspective links in Relational Quantum Mechanics”, Philosophy of Physics 1 (1), 1–19. Bell, J.S. 1989 “Against ‘measurement’”. In 62 Years of Uncertainty: Erice, 5–14 August

work page 2023

[2] [2]

Perceptual Objectivity

Plenum Publishers. Brandom, R. 2000 Articulating Reasons: An Introduction to Inferentialism (Cambridge, MA: Harvard University Press). Burge, T. 2009 “Perceptual Objectivity”, Philosophical Review 118 (3). 285–324. Fine, A. 1982 “Joint distributions, quantum correlations, and commuting observables”, Journal of Mathematical Physics 23, 1306–10. Fuchs, C. 2...

work page 2000

[3] [3]

A Subjectivist’s Guide to Objective Chance

Healey, R. 2026 Pragmatism Works: Essays on Quantum Theory, Science and Metaphysics. Oxford: Oxford University Press. Kochen, S. and Specker, E. 1967 The problem of hidden variables in quantum mechanics. Journal of Mathematics and Mechanics 17, 59-87. Lewis, D. 1980 “A Subjectivist’s Guide to Objective Chance”, in Jeffrey, R. C. (ed.) Studies in Inductive...

work page 2026

[4] [4]

Assessing Relational Quantum Mechanics

A reply to Rovelli's response to our “Assessing Relational Quantum Mechanics” arXiv preprint arXiv:2107.05817 Ollivier, H., Poulin, D. and Zurek, W. (2004) "Objective properties from subjective quantum states: environment as a witness", Physical Review Letters 93, 220401. Riedel, T. forthcoming “Is quantum relativism untameable? Revenge Wigner arguments f...

work page arXiv 2004