It was a "full stack" thing. From silicon on up. And it definitely got fuzzier the higher up in the stack you went. Prolog-ish was big in the upper tiers of the stack (esp. as it had to do with "modularized knowledge" paks), but "support-all-symbolic-approaches" were motivating requirements on the lower tiers.

I lived in Japan, doing systems engineering for what are now called SOCs, before I moved to Austin during this period, and the PR around the 5th Generation Project had both the Japanese officials feeling high-on-life and the American officials a little deer-in-the-headlights panic-ey. IBM and Fujitsu (and Toshiba, and Motorola and AT&T) all made some bank off of frightened (or overly ambitious) politicos.