An old physics professor will say that if you could know what spin and velocity each electron in the universe had at an instance of time, you could sort out the past and predict the future. This is a mainstay of classical physics. (No free will)
The quantum guys say it is impossible to know the spin and velocity of a particle, you can only have one or the other. This is one of the mainstays of Quantum physics. (Free will)
The string guys, well their still trying to cowtoe to Witten, who says every string theory is right if you look at it a certain way. (Doesn't matter, it's really the same thing)
So you tell me. I think this is a pretty useless debate.
Personally, I do what I want with in reason. Only my morals and some of 'the law' inhibit my desires. But I could break these conventions. I have free will.
For Christians - Without free will, how could have man fell? How could God judge you if you didn't have free will? God told Cain that if he did well, would he not be accepted? Sin was at his door but Cain could resist it. Seems like free will to me.
But then again, I am suspect, for I don't care one drivel for Decartes "I think therefore I am." Bullsnot to be nice. Don't know about you but I think because I exist, if I didn't exist there would be no thinking. I was an ET before retiring, so I only have an AS in electronics, so I'm kinda a country commmon sense guy. (without a whole lot of common sense) :^)