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REVIEW 2 major objections 4 minor 55 references

Becoming, Duration, and the Evolving Block Universe

T0 review · 2 major / 4 minor · reviewed 2026-07-12 · grok-4.5

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Pith's one-line read Lived time sits one step past brain time in the Evolving Block Universe, and the leftover gap is epistemological, not physical.

desk verdict Clean conceptual framing of the two-times residue as an epistemological gap after EBU brain time; solid synthesis, modest claim, soft only on the unargued hard-problem step. read the letter →

arxiv 2607.03415 v1 pith:CU3BACVI submitted 2026-07-03 physics.hist-ph gr-qc

Nicolò Cangiotti This is my paper · ORCID
classification physics.hist-phgr-qc
keywords two-timesproblemEvolvingBlockUniverseBergsonduréebraintimeDirectionofwave-functioncollapsespeciouspresentexplanatorygap
open problems The Measurement Problem
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 two-times problem is the mismatch between the direction-neutral time of fundamental physics and the oriented, present-centered time of living systems. This paper takes the Evolving Block Universe, in which spacetime grows along preferred matter worldlines by irreversible quantum collapse, as the best physical account of directed time and of its multi-scale emergence up to brain time. It then argues that even a fully successful physical hierarchy stops short of the continuous qualitative experience of passage. Bergson's durée names that first-person level. Completing the chain as cosmological proper time to local proper time to brain time to durée keeps the structural half of the problem from being confused with the experiential half and shows that the residue is the familiar explanatory gap of philosophy of mind, not a missing piece of physics.

What carries the argument

The completed multi-scale hierarchy τ_global → τ_local → T_B → durée, where the last arrow is not a further physical coarse-graining but the passage from third-person parametric description to first-person lived experience.

What would settle it

A no-collapse interpretation of quantum mechanics that still supplies a structural, non-statistical Direction of Time for an evolving block, or a third-person measurement of brain time that demonstrably captures the qualitative feel of temporal passage rather than only its neural correlates.

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Extended reading notes

Core claim

The Evolving Block Universe solves the structural half of the two-times problem by making physical time directed, non-homogeneous, and open toward the future, but it cannot reach felt passage. Bergson's durée is the name for the irreducibly first-person level that completes the hierarchy beyond brain time; the remaining gap between physical time and lived time is therefore epistemological rather than ontological.

Load-bearing premise

The argument needs objective wave-function collapse to happen everywhere, all the time, so that irreversible quantum events can grow the spacetime manifold and give the Direction of Time its microphysical basis.

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Editorial analysis

A structured set of objections, weighed in public.

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

Referee Report

2 major / 4 minor

Summary. The paper addresses the two-times problem by combining Ellis’s Evolving Block Universe (EBU) with Bergson’s durée. It reconstructs the EBU’s physical structure (Ricci eigenlines defining preferred worldlines, present surfaces S(τ), ADM evolution restricted to the growing manifold M(τ), and non-unitary collapse as the mechanism of irreversible ‘concretizing’), its multi-scale hierarchy of temporal parameters (τ_global → τ_local → T_B), and the structural Direction of Time versus local arrows. It then argues that this hierarchy reaches a limit at brain time: the residual gap to lived temporal passage is completed by Bergson’s durée as an irreducible first-person level, so that the remaining mismatch is epistemological (the familiar explanatory gap) rather than a further physical shortcoming of the EBU. The paper contrasts this with dualistic continuity-illusion models that treat felt passage as partly adaptive illusion, and claims a two-way exchange in which the EBU supplies physical content for Bergsonian theses (open future, real becoming, structural irreversibility, non-homogeneity) while durée names the first-person residue the EBU cannot capture.

Significance. If the central claim holds, the paper usefully reframes the two-times problem by keeping its structural/third-person and experiential/first-person halves distinct instead of conflating them, and it supplies a precise address for the residual gap (T_B → durée in hierarchy (7)). The reconstruction of the EBU is accurate and the Bergson reading is carefully limited; the multi-scale hierarchy and the Direction-of-Time versus arrows distinction are clarifying contributions to the philosophy of time literature. The work does not claim to close the gap or to derive new physics; its value is diagnostic and integrative. Strengths include explicit flagging of the collapse-interpretation dependence and a measured contrast with Montemayor & Gruber rather than dismissal. The result is of interest to foundations of physics and philosophy of time, though its novelty is primarily in the framing rather than in new technical results.

major comments (2)
  1. [§6 hierarchy (7); §7] Section 6, hierarchy (7) and the surrounding discussion, together with §7: the load-bearing claim is that the final transition T_B → durée is an irreducible explanatory gap of the philosophy-of-mind type (no third-person description can capture the qualitative character of passage) rather than a further physical or functional relation that neuroscience or a refined IGUS model might close. The paper equates the gap with the familiar hard-problem residue and contrasts the dualistic continuity-illusion account, but supplies no independent argument why measurable neural coarse-graining at T_B cannot, even in principle, exhaust the qualitative features of lived duration. Without that argument the hierarchy does not demonstrably ‘reach its limit at the epistemological level,’ and the paper’s distinctive contribution risks collapsing into a restatement of the dualistic programme it opposes. Thi
  2. [§3 transition (5); §6] Section 3, transition (5) and the accompanying text: while the paper correctly notes that the use of collapse is conditional on a collapse-based interpretation and that alternatives would require a different irreversibility mechanism, the Direction of Time and the ‘concretizing’ process that grows M(τ) are repeatedly presented as structurally grounded in non-unitary, informationally irreversible collapse that ‘happens all the time everywhere.’ For the EBU’s physical content for Bergson’s absolute irreversibility and genuine novelty (Section 6) to remain robust under no-collapse interpretations, the paper should more explicitly separate the geometric growth structure (isometric inclusions (4), Ricci eigenlines) from the particular microphysical mechanism and indicate what alternative grounding would preserve the same structural claims.
minor comments (4)
  1. [Figure 1; §3–4] Figure 1 caption and surrounding text: the schematic is helpful, but the isometric-embedding arrow and the labelling of the former present as ‘now past’ could be made more explicit for readers less familiar with the EBU literature; a brief note on how the CBU ‘crinkly’ refinement alters the thickness of S(τ) would also help.
  2. [§5] Section 5: the three-moment reconstruction of Bergson’s spatialization critique is clear, but a short cross-reference to the precise passages in Essai and Durée et Simultanéité that are being glossed would aid readers who wish to check the fidelity of the reconstruction.
  3. Throughout: minor typographic inconsistencies appear in the rendering of accented terms (durée, s’interpénètrent) and in the spacing around mathematical operators in the ADM equations; these should be standardized in production.
  4. [References] References: the 2025 Montemayor & Gruber item is cited as forthcoming/in press; confirm the final bibliographic details and DOI before publication.

Circularity Check

0 steps flagged · score 1.0 of 10

No significant circularity: the paper is a philosophical mapping of Bergson's durée onto Ellis's independent EBU hierarchy, not a derivation that forces its conclusion from its own inputs.

full rationale

The manuscript does not claim a first-principles derivation or empirical prediction that reduces to fitted inputs. Its physical structure (Ricci eigenlines, ADM foliation, collapse-based growth of M(τ), multi-scale hierarchy τ_global → τ_local → T_B) is taken from Ellis (2006, 2014, 2024) and Ellis & Rothman (2010). Those citations are external to the present author and supply independent physical content; they are not self-citations that define the target result. The paper's distinctive move—completing the hierarchy as T_B → durée and locating the residual two-times gap at the epistemological level (hierarchy (7), §6–7)—is an interpretive philosophical claim, not a quantity forced by construction from the EBU equations. No parameters are fitted and then re-presented as predictions; no uniqueness theorem is imported from the same author; no known empirical pattern is merely renamed. The only mild self-referential element is the paper's own framing of the gap as the familiar hard-problem residue of philosophy of mind, which is asserted rather than derived, but that is ordinary philosophical argumentation, not circularity of the kinds listed. Score 1 reflects ordinary reliance on a prior research programme without load-bearing circular reduction.

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

The paper introduces no free parameters and no new physical entities. It rests on (i) standard general-relativistic geometry, (ii) Ellis’s Evolving Block Universe framework including objective collapse, and (iii) Bergson’s phenomenological account of durée. The sole constructive addition is the interpretive completion of Ellis’s hierarchy by durée as an epistemological terminus.

assumptions (5)
  • domain assumption Ricci eigenlines of the matter-determined Ricci tensor supply geometrically preferred timelike worldlines that define the EBU’s present surfaces and global Direction of Time.
    Taken from Ellis (2014) and standard GR energy conditions; invoked throughout §3 and the hierarchy of §4.
  • domain assumption Objective, non-unitary wave-function collapse occurs ubiquitously and is informationally irreversible, thereby grounding the one-way growth of the EBU manifold.
    Explicitly conditional on a collapse interpretation (Ellis 2014); stated in §3 around transition (5). Alternative interpretations would require a different irreversibility mechanism.
  • domain assumption Brain time T_B is a real, non-linearly related physical parameter that coarse-grains local proper time but remains third-person and measurable.
    Taken from Ellis (2024); used to locate the residual gap one level below T_B (§4, §6).
  • domain assumption Bergson’s durée is a continuous, qualitatively heterogeneous, irreversible, first-person structure of lived time that cannot be fully captured by any third-person parametric description.
    Standard reading of Bergson (1889, 1922, 1934); reconstructed in §5 and inserted as the final hierarchy step in §6.
  • domain assumption The explanatory gap between third-person physical description and first-person experience is real and epistemological (philosophy-of-mind hard-problem style).
    Invoked in §7 to classify the T_B → durée step; not derived but assumed as the correct diagnosis of the residual gap.
invented entities (1)
  • Completed EBU hierarchy terminating in durée (τ_global → τ_local → T_B → durée)
    purpose: Names the residual first-person level that physical parameters cannot reach and thereby locates the two-times gap as epistemological.
    The first three levels are Ellis’s; the paper adds durée as the terminal first-person step. No independent empirical handle is offered beyond the conceptual claim itself.

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Cite this review

Pith. "Pith review of Becoming, Duration, and the Evolving Block Universe." pith.science (2026). https://pith.science/paper/CU3BACVI

@misc{pith2026260703415,
  author       = {Pith},
  title        = {Pith review of: Becoming, Duration, and the Evolving Block Universe},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/CU3BACVI}},
  note         = {Machine review of arXiv:2607.03415}
}
read the original abstract

The two-times problem asks how the directed, oriented time of biological and conscious systems relates to the time of fundamental physics. The Evolving Block Universe, in which spacetime grows along Ricci eigenlines through an irreversible quantum dynamics, explains the direction of physical time and its multi-scale emergence up to brain time. It does not explain how this physical time is related to the experience of temporal passage. We argue that Bergson's dur\'ee, the continuous qualitative experience of lived time, marks the first-person level beyond brain time at which this hierarchy reaches its limit. This locates the remaining gap between physical time and lived time at the epistemological level.

Figures

Figures reproduced from arXiv: 2607.03415 by the authors.

Figure 1
Figure 1. The Evolving Block Universe. (a) The universe at parameter value τ1: the spacetime manifold M(τ1) (blue region) is bounded to the future by the present surface S(τ1) (yellow boundary). The red curve is a fundamental worldline (Ricci eigenline). (b) The universe at a later param￾eter value τ2 > τ1: the manifold has grown by the amount ∆τ = τ2 − τ1. The earlier manifold M(τ1) embeds isometrically into M(τ2), establish… view at source ↗

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Reference graph

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