Good points. I would take it a bit further by noting that a defense of non-trivial free will cannot rely upon quantum mechanics (or any other engine of unpredic

Good points. I would take it a bit further by noting that a defense of non-trivial free will cannot rely upon quantum mechanics (or any other engine of unpredictability). By non-trivial free will, I mean a kind of free will that allows for some control over what is being willed. The thesis describing a wholly causal universe is known as "determinism." The thesis of a less-than-wholly causal universe, no matter the degree to which strong causality governs, is known as "indeterminism." Together, they describe the entire set of possible worlds. Because free will is impossible in either case, free will is thus absolutely impossible, no matter what.