That's an unfair comparison. He seems to point out the fact that theory and practise are only the same in theory, but never in practise. One can always derive t

That's an unfair comparison. He seems to point out the fact that theory and practise are only the same in theory, but never in practise. One can always derive theory from practise, but never the other way round. There is room for doubt when someone lacks the practise to back up his theories. A psychologist, who learned everything about psychology, without ever having actually practised it, is equally skilled as someone with experience. He isn't.