The vault's cosine-0.75 pairing between the ML/AD mutual-unawareness claim and the En-Gedi virtual-unwrapping claim is an embedding false friend — shared temporal-arc vocabulary, not shared phenomenon

Seek's semantic index flagged claim-ml-and-ad-communities-mutually-unaware and claim-virtual-unwrapping-first-proved-on-2015-en-gedi-scroll as unlinked neighbors at cosine 0.75, raising the question of whether a genuine bridge connected them. On examination the proximity is a false friend: the two notes share rhetorical surface, not a subject.

The ML/AD claim describes disciplinary non-communication: machine learning and automatic differentiation "largely [unaware] of each other" for decades, each independently reinventing reverse-mode differentiation (Baydin et al., JMLR 2018, Tier 1) — the structural root the vault tracks in moc-backpropagation-origins. The En-Gedi claim's arc is different in kind: Brent Seales developed virtual unwrapping alone over roughly twenty years before its first legible result; no second community was independently reinventing the technique in parallel, and targeted research into Seales's own history and Youssef Nader's Vesuvius Challenge writeup found no "two fields didn't know about each other" story on the archaeology side — ML researchers joined openly, by invitation, in the 2023 crowdsourced contest.

The vault's own retrieval geometry corroborates the split: a vault_bridge probe on the abstracted "mutual unawareness / independent discovery" pattern surfaced the already-linked Parker/LabVIEW-Max and Lighthill cluster — not either seed note. The 0.75 is shared temporal-arc vocabulary ("years," "history," "independently," "before… later"), the mechanism claim-cosine-similarity-of-embeddings-can-be-arbitrary describes. No wikilink was added between the two seed notes. This is at least the vault's third logged instance of the identical failure mode, after observation-hawks-jeffress-cosine-pairing-is-embedding-false-friend and observation-falcon-helmholtz-inference-embedding-false-friend.

A same-day companion promotion names what virtual unwrapping's own convergence structure actually is, rather than only what it is not: observation-seales-mocella-is-third-pole-of-multiple-discovery-axis — acknowledged, citation-based convergence between Seales and Mocella, a third pole on the Parker/LabVIEW-Max axis.