DARPA's mid-1970s demand that Werbos deliver 'crisis warning,' not 'pure theory,' matches Larry Roberts's independently documented account of DARPA-wide pressure after the Mansfield Amendment

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In the same 1993 oral-history sitting behind claim-werbos-1978-docsub-blocked, Paul Werbos describes how DARPA framed its expectations of him in the mid-1970s: "Look we don't want pure theory. You can spend some time on pure theory, maybe half your time. But you've got to do it as crisis warning. And we want a practical application." Read next to the DOCSUB block, the line supplies a motive: a report built around a theoretical method (backpropagation) was the wrong shape for what his program was funded to produce.

Werbos's account is not an isolated grievance. Larry Roberts, a DARPA/IPTO program manager, gives an independent first-person retrospective account of the same pressure applying DARPA-wide, tied explicitly to the 1969 Mansfield Amendment's bar on defense funding without "a direct and apparent relationship to a specific military function": the amendment, in Roberts's words, "forced us to generate considerable paperwork and to have to defend things on a different basis" and "made us have more development work compared to the research work." The further gloss that DARPA program managers became "careful to justify projects with specific military applications in mind" is Gilliam's own narration, not Roberts's words. Roberts's words reach this note secondhand, quoted in Eric Gilliam, "A Note on the Changing Faces of (D)ARPA" (Good Science Project, 2025) — a named-author secondary synthesis (Tier 2) citing Roberts's own 1988 retrospective chapter ("Expanding AI Research," in Thomas C. Bartee, ed., Expert Systems and Artificial Intelligence: Applications and Management, 1988, pp. 229–230), not an oral-history transcript — rather than from Roberts's own text directly.

The corroboration links two vault clusters that had not previously touched: Werbos's backpropagation-priority history, and the Vietnam-era defense-funding-politics cluster anchored by the Mansfield Amendment and MIT's 1973 Instrumentation Lab divestiture. Werbos's DARPA program is described, in his own account, as running through a "Cybernetic Technology Office," later folded into DARPA's Defense Sciences Office in 1980 — a detail [unverified-mechanism — needs primary; not found independently this session] and not load-bearing for the claim above.