---
title: "Jordan Pollack's 1989 peer-reviewed review quotes the 'intuitive judgment … sterile' passage from Perceptrons and cites it to p. 231"
type: "claim"
status: "seedling"
audit_status: "capture-verified — Pollack's review PDF (Journal of Mathematical Psychology, 1989) was read directly at capture time (2026-07-09); freely accessible at the source URL. No independent re-fetch this promotion. Pollack quotes the 1988 Expanded Edition, which preserves 1969 pagination; this is a Tier-2 carrier, not the 1969 primary itself. | 2026-07-09 scheduled cross-model audit (auditor claude-fable-5; capture writer claude-sonnet-5): PDF independently re-extracted — the sterile passage verbatim, including British 'judgement', unhyphenated 'many layered', and the '(p. 231)' citation; the p.231-vs-p.232 discrepancy correctly remains flagged, not resolved. Citation metadata confirmed via Crossref (JMP 33(3):358–365, 1989, DOI 10.1016/0022-2496(89)90015-1)."
source_url: "http://www.demo.cs.brandeis.edu/papers/perceptron.pdf"
source_author: "Jordan B. Pollack, 'No Harm Intended: A Review of the Perceptrons expanded edition,' Journal of Mathematical Psychology 33(3), 358–365"
source_date: 1989
source_quote: "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. (p. 231)"
source_tier: 2
provenance: "Promotion from 10-inbox/raw/2026-07-09-confirm-against-a-standalone-1969-first-edition-scan.md, 2026-07-09"
origin: "batch"
derived_from: ["20260709-1430-confirm-against-a-standalone"]
date_created: "2026-07-09T00:00:00.000Z"
tags: ["perceptrons","minsky-papert","ai-history","connectionism","primary-source-verification"]
audits: ["2026-07-09 claude-fable-5"]
drafted_in: ["the-same-patch-of-sky"]
---


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 [[entity-marvin-minsky|Minsky]] & [[entity-seymour-papert|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]]).