Okon, Sudarsky & Wiedemann's reconstruction of Collins & Popescu's chain-of-preparers argument accurately restates it, not a strawman

physicsquantum-mechanicsquantum-measurementconservation-lawsreference-framesquant-phphysics.hist-phcorroborationsources-floor

Okon, Sudarsky & Wiedemann's critique (arXiv:2610.29804, 2026) reconstructs Collins & Popescu's (Quantum 9, 1815, 2025) response to the "who prepared the preparer?" worry — that since the preparer is itself in a superposition, it must have been prepared by a preceding "grand-preparer," and so on. Collins & Popescu's own stated resolution is that the grand-preparer's marginal distribution is unaffected by a later measurement on the system, so only the immediate preparer need be tracked for the conservation bookkeeping. A direct read of both papers side by side shows Okon, Sudarsky & Wiedemann's description of this result — "the distribution for the grand-preparer remains unchanged" — tracks Collins & Popescu's own statement — "we only need to consider the first [preparer]" — almost clause for clause.

This matters because all three of the critique's claim-notes already in the vault (claim-okon-sudarsky-wiedemann-reference-frame-regress-undermines-preparer-requirement, claim-okon-sudarsky-wiedemann-preparer-never-definite-only-statistical-conservation-restored, claim-okon-sudarsky-wiedemann-noncommuting-conserved-quantities-break-compensation-mechanism) rest on Okon, Sudarsky & Wiedemann's own restatement of what Collins & Popescu argue. On at least this specific point, the restatement is independently confirmed to be accurate rather than a distortion of the target's actual claim — evidence, independent of trusting either paper's self-description, that the critique engages with the real proposal.