The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.

Where we have good, testable explanations, they then have to be tested, and we drop the ones that fail the tests.

The truly privileged theories are not the ones referring to any particular scale of size or complexity, nor the ones situated at any particular level of the predictive hierarchy, but the ones that contain the deepest explanations.

Science is objective. And in my view we cannot take any experimental results seriously except in the light of good explanations of them.

There was an absolutely closed mind. They would not look at alternative explanations.

He has had a lot of tests done, and we are not quite sure what it is. We did not think he was going to be right in time for the game, and with a big game like this you need people who are going to be 100 per cent fit.