> free will, which is, by any interesting definition, a supernatural entity
How so? I can think of at least one interesting definition by which free will is a perfectly good physical process going on in human brains, not supernatural at all.
Depends on which definition of free will you are using. Some definitions are compatible with determinism.
Also, even if we go with a non-deterministic definition of free will, "non-deterministic" is not the same as "supernatural". Quantum mechanics is not deterministic.
How so? I can think of at least one interesting definition by which free will is a perfectly good physical process going on in human brains, not supernatural at all.