As far as predestination is concerned that requires a god. That god must be rather peculiar from our point of view to create the whole universe just to see it do exactly what he/she/it created it to do. Of course we do similar things by creating toys that repeatedly do the same actions over and over, so who am I to judge god?
The thing about this is that it really doesn't matter whether you are talking classical physics or QM, at its base everything works on physical principles. So your brain works by physical interactions which occur in response to physical laws. So physical laws determine what your brain can do.
Having said that there is the question of just how complex your brain is. It is of course a non-linear system, so we have to throw in chaos theory. And from that free will may be emergent.
And of course it certainly looks like we have free will.
Bill Gill
