Jordan Pollack's 1989 peer-reviewed review quotes the 'intuitive judgment … sterile' passage from Perceptrons and cites it to p. 231

Jordan Pollack's 1989 review of Perceptrons (Journal of Mathematical Psychology, peer-reviewed) quotes the passage on which claim-perceptrons-multilayer-sterile-was-conjecture rests — "There is no reason to suppose that any of these virtues carry over to the many layered version. Nevertheless, we consider it to be an important research problem to elucidate (or reject) our intuitive judgement that the extension is sterile" — and cites it to p. 231.

This does two things for the vault. First, it upgrades the carrier: the sterile quote had previously been read only at a Tier-3 essay (yuxi.ml), leaving claim-perceptrons-multilayer-sterile-was-conjecture flagged [unverified-quote — needs primary]. Pollack is a named academic quoting the physical book verbatim in a peer-reviewed venue — a Tier-2 carrier, materially stronger than the prior source (though still the 1988 Expanded Edition, which preserves 1969 pagination, not a direct read of a standalone 1969 scan).

Second, it introduces a page-number discrepancy: the existing note and question-verify-perceptrons-p232-sterile-quote attribute the passage to p. 232, while Pollack cites p. 231. Pollack's arabic page numbers are consistent with the preserved-1969-pagination body, so his p. 231 is a concrete, independent data point against the p. 232 attribution. Minor textual variants also appear (British "judgement"; "many layered" without hyphen) — likely transcription differences between carriers, worth resolving against the primary.

The discrepancy is not silently resolved here; it is flagged to question-verify-perceptrons-p232-sterile-quote for a direct read. The passage's significance — that Minsky & Papert marked the multilayer "sterile" claim as self-flagged conjecture, not proof — is unchanged and feeds myth-perceptrons-book-killed-connectionism.

The page-number and spelling variance across carriers here is an instance of textual variance across physical copies — the object of bibliographic collation, the same problem early modern printers created by copy-specific correction in claim-early-modern-printers-corrected-print-with-cancel-slips (bridge: 2026-07-11-hop-collation-bridges-cancel-slips-and-citation-variance).