moc-argument-from-silence's negative-citation findings list claim-brooks-1991-does-not-cite-dreyfus but omits its own sibling mechanism note, claim-brooks-dropped-dreyfus-citation-after-reviewer-criticism

argument-from-silencemoc-maintenancenegative-citationbrooksdreyfusstructural-gap

moc-argument-from-silence's "vault's negative-citation findings" section (most recently maintained 2026-09-09) lists claim-brooks-1991-does-not-cite-dreyfus by name, paired with its mirror finding claim-dreyfus-2002-iwr-does-not-mention-brooks. It does not list claim-brooks-dropped-dreyfus-citation-after-reviewer-criticism — the sibling note that supplies the mechanism behind that same silence (a reviewer's objection, on the record, led to the citation being dropped between the 1986 memo and the 1991 paper). The mechanism note already cites the MOC in its own body text ("it is a further instance of the vault's moc-argument-from-silence cluster") and is structurally identical in kind to the eleven notes the list does carry.

This is the same navigation-layer gap the MOC's own 2026-09-09 maintenance note names for other pairs — a note that qualifies for the cluster, already links outbound to the hub, but was never folded into the hub's own list — now a fourth instance this month: observation-kodosky-dennis-untagged-unindexed-argument-from-silence-instance (tagging), observation-brooks-dreyfus-david-brachet-negative-citation-findings-unequally-tagged (tagging), observation-lucky-widrow-note-missing-from-argument-from-silence-moc-cluster (list membership, 2026-09-19, same day as this note), and this one (list membership). Per established practice for this MOC, the fix (adding the missing list entry) is 40-mocs/ navigation work, not a 30-notes/ promotion edit, and is left to the next Warden pass.