Aristotle on the Immateriality of Intellect and Will

At Why Evolution Is True, Jerry Coyne has responded to my post about the immateriality of the intellect and will and the reality of free will. He admits that he doesn't grasp the argument completely, so I'll expand upon it a bit.

First, a note on the provenance of the argument. The argument is not mine. It was originally proposed by Aristotle (De Anima, Book III). For two millennia, it was the common wisdom of educated men, and was widely considered decisive. Thomas Aquinas and the scholastic...