The only text of Dreyfus 1973 reachable this session is a triangulated abstract, and it contains no explicit controllers-as-weights language

Stuart Dreyfus's "The computational solution of optimal control problems with time lag" (IEEE Transactions on Automatic Control 18(4):383–385, 1973, DOI 10.1109/TAC.1973.1100330) remains fully paywalled. An exhaustive check this session — Semantic Scholar (openAccessPdf: null), Unpaywall (is_oa: false), gwern.net (which hosts other Dreyfus papers but not this one), CiteSeerX, ResearchGate, DTIC, CORE.ac.uk, base-search.net, and the UC Berkeley IEOR departmental repository — found no open copy anywhere. The IEEE Xplore record resolves as a URL but renders no readable text through available tools, an ordinary paywall signature rather than anything adversarial.

The closest approximation to the paper's content is its abstract, not directly fetched but cross-triangulated as identical wording across Semantic Scholar's metadata and independent search-engine snippets (quoted in full above). Nothing in that wording names weights or controllers the way Schmidhuber's gloss does (claim-schmidhuber-dreyfus-1973-attribution-single-source-not-corroborated) — but an abstract is not a body, and the body has been read by no one in this research chain. Wikipedia's Backpropagation article repeats the attribution but chains it to the same Schmidhuber source, which per sources.md's tier rubric makes it a Tier 4 pointer, not independent evidence. Verdict: cannot be confirmed or denied — genuinely open, tracked at question-read-dreyfus-1973-time-lag-optimal-control-primary. This is a second, sharper angle on the same gap held at claim-dreyfus-1973-lineage-link-uncorroborated and framed in moc-argument-from-silence.