I'm very saddened by this loss. I took him for both 6.034 (artificial intelligence) and his survey course 6.803 (the human intelligence enterprise). Some memories:
1. I still use VSNC (you can read more about it here: http://blog.pptstar.com/?p=441) as a simple model for delivering technical talks. As a coincidence I has already been planning on giving a meta talk about this to my team next Friday. He cared more about, and spoke more about, presentation skills than every other lecturer I had at MIT, combined.
2. He was also the only professor I heard speak about the value of leadership skills and how they can be cultivated.
3. He really did care about his students. I remember his saying to help us get over imposter syndrome, "At MIT, 5% of students think it's too easy, 10% of students think it's just right, and 85% think that at any moment they're going to be found out."
4. I still remember his definition of intelligence as something you almost understand. He would tell the story of giving a preview of an upcoming lecture where they would write a program to do differential calculus. A student came up to him and said "There is no way a computer could ever do that!" After the lecture the same student came up to him and said "That wasn't really AI. The program just does it the way I do it!"
thank you for sharing these
especially love #4