Mind: A Brief Introduction (John R. Searle) / quote 49 of 138
Behavior is evidence of mind, not mind itself
Chomsky claimed that the idea that when we study psychology we are studying behavior is as unintelligent as the idea that when we study physics we are studying meter readings. Of course we use behavior as evidence in psychology, just as we use meter readings as evidence in physics, but it is a mistake to confuse the evidence that we have about a subject matter for the subject matter itself. The subject matter of psychology is the human mind, and human behavior is evidence for the existence and features of the mind, but is not itself the mind.