So you go to a psychiatrist. You may think psychiatry is science, medicine art, indeed all three. You may believe, as they do, that the psychiatrist has some privileged knowledge about the mind, who you are and what ails you. You may think that their invocations to genetics and neurochemistry are based upon facts, and their diagnoses are according to the truth of the world, the truth «out there» as much as in you. You may be tempted to believe that the psychiatrist is as indispensable to the...