Subject: Re: Free will?
Or...they're trying to find a logical, coherent argument that can refute their position.

I haven't seen one for free will. Not yet, anyway. They invariably involve logical fallacies, or things that don't really solve the problem (e.g. soul). I will say we have the illusion of free will simply because we can't know all the genetics and wiring (especially the wiring), plus all events that influenced a given situation, plus any random quantum processes that might be at work (if any). It's far too complex, so we are "surprised" and think we are deciding things real-time. But the brain is just rationalizing a "decision" after the fact, or possibly even rewriting the narrative.