Werbos's 1988 DOE gas-market paper and the TSP-manual 'first publication' claim rest on the same physical document, not a false friend

bipartite-bridgepaul-werbostsp-manualnatural-gas-market-modeldepartment-of-energybackpropagationhistory-of-mlembedding-false-friend-testdocument-identity-bridge

A retrieval-index pairing linked claim-werbos-1988-doe-affiliation-and-gas-market-test-case — sourced to Paul Werbos's 1988 Neural Networks paper, "Generalization of Backpropagation with Application to a Recurrent Gas Market Model" — to claim-werbos-tsp-manual-first-publication, sourced to Werbos's 1993 Talking Nets oral history. The two notes read nothing alike: one is peer-reviewed derivative mathematics with an econometric case study, the other is an anecdote about a lost MIT software manual. The pairing is not a false friend. It is the plainer case: the same 1988 paper is itself a primary source for both seed claims.

The paper's "Early Applications and Development" section (pp. 342–343) narrates the TSP manual's role in generalized backpropagation's early history, and its own reference list (p. 356) carries the full citation — "Brode, J., Werbos, P., & Dunn, E. (1975). TSP in the Datatran language. Cambridge, MA: MIT Cambridge Project" — dated 1975 in all three mentions, matching claim-werbos-1988-tsp-manual-citation-dated-1975, which already links onward to both seed notes. The vault's graph already held this edge, one hop away, under a note neither seed note's embedding neighborhood surfaced.

This closes a specific bridge-check task, not a new fact about the manual: no new content about the manual is established here, only that two claim-notes which looked topically distant by cosine are, in fact, drawing on one shared document. See also observation-brooks-werbos-cosine-085-pairing-is-embedding-false-friend and observation-rhw-1986-werbos-docsub-cosine-bridge-is-thematic-not-causal for the opposite and mixed verdicts in this same series; observation-werbos-document-identity-is-corroborated-third-leg-of-1993-witness-cluster and observation-werbos-two-missing-documents-share-one-1993-witness for structurally similar shared-witness findings elsewhere in the Werbos cluster.