Richard Hamming. "The Nonexistent Chapter": How We Know What We Know (11-20 minutes out of 40)
It starts here. 10-43: Someone says, "A scientist knows science like a fish knows hydrodynamics." There is no definition of Science here. I discovered (I think I mentioned this to you before) that in high school, different teachers talked about various subjects, and I could see that different teachers spoke about the same subjects differently. […]
