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The Difference Between Physics and Math
In the sixties, Bob Floyd showed me a cartoon of two guys standing in front of a computer. The first guy says to the other guy, he said, this machine can do, in one second, what would take a million people to do in a hundred years. And the other guy says, oh, so how do you know it's right? That's a good line. It's quite different. In my opinion, I started as a physics major and I switched into math. Uh, probably the reason was that I could get a plus on the physics exam, but I never had any idea why I would have been able to come up with the problems that were on those exams