thinking

You cannot reason a man out of what he never reasoned himself into.

'Conventional wisdom' is just group think without basis.

I have a theory, and I offer it to you as a pocket theory. I have a category of theories that I call pocket theories. Because there is no evidence, no research behind them.

The scientific mind is not closed: it is merely well-guarded by a conscientious and seldom sleeping gatekeeper.

The person who says he knows what he thinks but cannot express it usually does not know what he thinks.