Freud’s Hysteria Theory Backed by Patients’ Brain Scans

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5. You get to be my age, you have no doubts about who is the boss.

There are, so to speak, purely mental things, but they always occur in the context of some physical process, there are not mental processes without some physical process that "implements" them. And it appears to me (conjecturally, but I can drive you nuts with arguments) that really fancy brains like mammals have pretty much have to be grown, you cannot just lay them out and fire it up like a robot. They have to learn, they are adaptive to particular cases.