We do not know where to look, or what to look for, when something is memorized. We do not know what it means, or what change there is in the nervous system, when a fact is learned. This is a very important problem which has not been solved at all.
Before I was born, my father told my mother, 'If it's a boy, he's going to be a scientist.'
It has not yet become obvious to me that there's no real problem. I cannot define the real problem; therefore, I suspect there's no real problem, but I'm not sure there's no real problem.
Once I get on a puzzle, I can't get off.
Physics has a history of synthesizing many phenomena into a few theories.
It is necessary to look at the results of observation objectively, because you, the experimenter, might like one result better than another.