When David Marr at MIT moved into computer vision, he generated a lot of excitement, but he hit up against the problem of knowledge representation; he had no good representations for knowledge in his vision systems.
Bio: Richard E. Dickerson was an American biochemist. He was the first to carry out a single-crystal structure analysis of B-DNA, with what has become known as the "Dickerson dodecamer": C-G-C-G-A-A-T-T-C-G-C-G.