It is always good to know which ideas cannot be checked directly, but it is not necessary to remove them all. It is not true that we can pursue science completely by using only those concepts which are directly subject to experiment.
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.
