You don't deny, "Naturalists believe that chemical actions cause mental events":
but you do deny, "If naturalism is true, chemical actions cause mental events"?
Yes, but I dont deny that if naturalism is true, then naturalists believe chemical reactions cause mental events.
Your response just makes no sense whatsoever. Tell me which of the following claims you deny:
1) Naturalism
IS the belief that everything is caused by natural, physical events;
2) Therefore, if naturalism is true, then everything
is caused by natural, physical events.
3) If everything is caused by natural or physical events, then mental events are caused by natural, physical events.
4) Therefore, if naturalism is true, then mental events are caused by natural, physical events (chemical reactions in the brain being overwhelmingly the leading candidate).
In other words, if naturalism is true, then the claims of naturalism are
NOT just something naturalists believe; they're the truth. Obviously. Self-evidently. Because to deny that would be to assert "even if naturalism is true, naturalism isn't true, it's just a belief." Which, again, just makes no sense whatsoever.