The flaw is in the logic used to come to the conclusion that free will is an illusion. This conclusion is reached because it assumes that the cause of a free will choice must be determined by the consequence of a previous physical event.
No, the reason it's an illusion is because the concept makes no sense. It's not a practical assessment that it's possible but we don't have it, it's a logical investigation that shows you can either have will, or you can have freedom, but you can't have both.
Science can be used to determine the consequences of events, but it can't be used to determine the cause of all events, so there is no means of proving the assumption that free will is an illusion and that every action we choose to make is pre determined.
Why can't science, in principle, determine the cause of all events? Our current capacity is limited, perhaps, but that doesn't mean that principles are outside of scientific exploration's remit.
Regardless of that, if our actions are determined by an initial situation, we don't have free will, whomever hypothetically set the process in motion would have had free will, we'd be automatons in thrall to that initial condition.
The reality I perceive is that my free will choices are invoked by my conscious awareness.
We know from any number of examples, though, that our perception is far from infallible.
I have to admit that I can't understand how anyone could assume that their free will is an illusion because this inextricable combination of free will and self awareness defines what the "I " is in me.
It's counterintuitive. I 'feel' like I'm in charge, it feels like I'm making decisions that my physical body then conducts, but that feeling isn't reinforced by the available evidence.
O.