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: Joseph Philippe Pierre Yves Elliott Trudeau was a Canadian politician. He was Prime Minister of Canada from April 20, 1968 to June 4, 1979, and again from March 3, 1980 to June 30, 1984. His eldest son is, a teacher and politician.