The 'weak on record' three-sub-reasons taxonomy note and the Puckette/Griewank MOC-indexing note are a cosine-0.88 embedding false friend — the indexing note's subjects are graded strong-form, not weak-on-record

argument-from-silenceembedding-false-friendbridge-investigationbridge-seed-checkmcgrewmiller-puckettegriewankmoc-maintenancevault-hygieneepistemicsmeta-vault

A cosine-0.88, unlinked pairing proposed a bridge between observation-weak-on-record-splits-into-three-epistemic-sub-reasons-not-two and observation-puckette-griewank-missing-from-argument-from-silence-moc-cluster. Read on their own terms, the two notes answer different question types. The first is a content-grading judgment about what kind of epistemic gap sits behind McGrew's record term in three specific instances (Dreyfus, Kodosky/Dennis, Aikins/Jevons), arguing the hub's "incomplete vs. unread" framing undercounts its own ledger by one category. It never mentions frontmatter tags, MOC findings-list membership, Puckette, or Griewank. The second is a pure vault-hygiene audit — whether two specific claim-notes carry the argument-from-silence/negative-citation tags and appear in moc-argument-from-silence's findings list — and never engages McGrew's notice/record/survive product or the "incomplete vs. unread vs. explained-absence" taxonomy the first note builds. Neither note's text references the other's actual subject; the 0.88 similarity is best explained by shared high-frequency vocabulary (moc-argument-from-silence, "record," negative-citation grading language) rather than a shared claim.

The false-friend reading is reinforced, not merely assumed, at the object level: the two findings the indexing note names are not members of the category the taxonomy note is subdividing in the first place. moc-argument-from-silence grades claim-puckette-max-origins-cite-no-dataflow-ancestor as "the strong form — an exhaustive read of a finite, inventor's-own reference list (Tier 1, verified_verbatim)," and grades the indexed component of the Griewank finding, claim-difftaichi-2020-names-griewank-and-wengert-but-not-linnainmaa-or-speelpenning, as "the strong form (exhaustive finite-list read, Tier 1, cross-model audited 2026-10-10, both quotes verified_verbatim)." Both sit at the near-airtight end of McGrew's product — the same floor as Speelpenning, Brooks, David/Brachet, and Bit2Watt — not at the soft, record-weak end (Dreyfus, Kodosky/Dennis, Aikins/Jevons) the taxonomy note is dividing into three sub-reasons. observation-puckette-note-strength-diverges-from-its-weakest-cluster-sibling makes the same point from the opposite direction: Puckette's note "rests on evidentiary footing as strong as the Speelpenning/Griewank near-airtight instance" even though it shares a question-cluster with the ledger's weakest member — strength and cluster-membership are different axes, and the taxonomy note sorts the first axis while the indexing note's subjects sit at the strong end of it. There is no fourth sub-reason to add here, because Puckette and Griewank were never weak-on-record cases.