I finally voted, and I'm surprised at the poll results. If there's no God or superwizard guiding our decisions behind the scenes, then our will is free... Even if our reality is deterministic.
What alternative is there?
I think what your not quite realizing is that that squishy lump of grey matter is your entire person. Without it, nothing you are exists. Just because its neurological processes (as opposed to what else exactly?), doesn't mean it cannot do free thinking, free decision making and indeed, has free will.
Of course if you set up your concept of free will specifically so that it can only be some magical outside force then yeah of course, magic doesn't exist. I'm not sure what your really trying to prove by redefining the question to fit your answer though.
Of course it does. If I replay my life a thousand times and each time the result is the same, that is not freedom of choice. I have no choice since my path is determined solely by outside stimuli.
If you can know me wholly as a person and then be able to predict every choice I make, then that is not freedom of choice as my path is already determined.
If the stimuli are the same, you make the same choices... But that doesn't mean your choices are restricted. Being predictable doesn't mean you aren't free. Only if you were going to make a choice, and then someone *altered your brain/thoughts*, would your free will be violated. So, I'd argue that free will can be violated if someone dopes you. Or if a wizard mind-controls you, or a god.
But being predicted is irrelevant. Say there's a vote coming up, and someone knows you very well. Enough to predict which way you'll vote. That doesn't remove your agency, you're still free to vote in a different way... You just won't.
Someone mentioned "replaying a situation". That's some Star-Trek level silliness, where they just kinda "feel" that they're in a time loop. If a situation is exactly the same, you'll freely choose the same thing. If there's any difference, you may freely choose something else.
If deterministic thought is not free, what is?
Seriously!