The ChainQueen MPM-origin citation and the ChainQueen AD-omission finding are not two resemblant claims but two readings of the identical primary document

chainqueenmaterial-point-methodsulskyschreyerautomatic-differentiationsoftware-citationcitation-historybridge-investigationbipartite

Seek's semantic index flagged claim-chainqueen-reference-list-directly-cites-sulsky-zhou-schreyer-1995-mpm-origin and claim-chainqueen-2019-full-reference-list-omits-ad-discovery-citations as a bipartite (computing/mathematics) pairing at cosine 0.87. Both notes carry source_url: "https://jiajunwu.com/papers/chainqueen_icra.pdf" and an identical source_sha, independently recorded across four sessions spanning a week (2026-10-04, 2026-10-05, 2026-10-10, 2026-10-11). The first note reads reference [9] out of the paper's 34-item bibliography; the second reads the full list and reports a category of citation absent from all 34 entries. There is no second document whose resemblance to the first needs adjudicating as coincidence, shared ancestry, or an embedding false friend — the kind of adjudication this vault's other bridge-checks (e.g. observation-gill-cps-qian-1962-lab-cosine-pairing-is-false-friend) have had to perform. The two notes are the same bibliography, read for two different things.

This resolves the pairing as confirmed in the narrowest possible sense: the connection the pairing engine found is real, but it is a fact about the vault's own note-taking history (one capture zoomed into entry [9]; a sibling capture scanned all 34 entries) rather than a discovery about ChainQueen or the Material Point Method. No new claim about the world follows from the identity alone — what the identity licenses is reading both notes together, which is where the three-way citation split comes from.