The vault's cosine-0.87 proximity between the Kelly et al. (2025) citation-misattribution note and the Luccioni et al. (2025) GPU-misdating note is an embedding false friend — same corrective ritual, different failure layer

embeddingscosine-similarityretrievalepistemicscitation-accuracybridge-investigationkelly-2025luccioni-2025david-r-mandelalexandra-sasha-luccioni

Seek's semantic index flagged claim-kelly-irwin-mandel-citation-misattributed-to-levine-2023 and claim-luccioni-2025-nvidia-gpu-figure-misdated-2023-as-2024 as unlinked neighbors at cosine 0.87. Both notes are Tier 1, both were produced by the same house discipline — a citation traced to its actual cited document by direct primary read rather than a secondary rendering — and both titles share vocabulary ("misattributed"/"misdated," "2023," a same-year mix-up caught by opening the reference). This is the surface an embedding trained on prose register would seize on, the same failure mode already named in observation-hawks-jeffress-cosine-pairing-is-embedding-false-friend and observation-gates-jevons-cosine-pairing-is-embedding-false-friend.

The discriminating test — whose error does the correction repair, and at what layer — dissolves the resemblance. The Kelly note fixes a chain-of-custody failure entirely on the vault's own side: three prior vault files had identified Kelly et al.'s in-text citation "(Irwin and Mandel, 2023)" as a different, similarly-titled Levine paper, traced to a WebSearch abstract that conflated two same-year, same-topic papers. Kelly et al.'s own citation was correct throughout; nothing they wrote was wrong. The Luccioni note fixes the opposite kind of failure: there is no dispute over which document citation [105] resolves to — the paper's own bibliography names it correctly — but the paper's body text misrepresents what that correctly-identified footnote actually says, attributing a 2023-vs-2022 shipment comparison to 2023-vs-2024. One note repairs a vault-side identification error invisible three files deep; the other repairs a paper-side internal-consistency error invisible until the footnote itself was opened. No wikilink was added between the two notes.

This is a different verdict-shape than observation-kelly-samet-cosine-pairing-real-link-opposite-axis-prescription, where the same author (Mandel) anchored a genuine citation link that still diverged on substance — here neither claim cites the other, and the resemblance is vocabulary alone.

A separate bipartite hop (2026-09-04) found that this note's own cosine-0.87 pairing with claim-garfield-seglen-and-steck-warnings-share-a-scalar-proxy-structure is, by contrast, a genuine bridge: both notes ground in the identical primary source (Steck, Ekanadham & Kallus, WWW 2024) and carry the identical quoted phrase in their own frontmatter — this note directly at arXiv:2403.05440, the Garfield-Seglen-Steck note one hop removed via claim-cosine-similarity-of-embeddings-can-be-arbitrary (corrected 2026-09-05; see audit_status). This note's diagnostic test is a concrete instance of the "vault's own embedding-false-friend diagnostic" that the Garfield-Seglen-Steck note names generically but does not link. See observation-kelly-luccioni-garfield-seglen-steck-cosine-pairing-is-confirmed-bridge for the full comparison (promoted 2026-09-04).