Chaos makes this complex and hard to calculate. But not impossible. Complexity Theory doesn't make the calculation too complex to perform, just says their results may be surprising.
And quantum mechanics makes things probabilistic. But it doesn't give you a choice.
I sort of see where you're coming from. However, historically belief in Predestination has been a Bad Thing as people used it to excuse doing all sorts of stuff - moderated only slightly by the concomitant belief in a Deity of some sort. Predestinarian atheists would be Really Scary.
From what I've done with molecular dynamics on comparatively small systems, simply modelled, I'd say that there are some things we simply can't calculate if only because the energy state difference between two or more intermediate stages is less than the uncertainty in the background - and by the time you scale up from the molecular to the macro level, any form of predestination is right out the window.
The fact that a theory has been used to excuse terrible acts doesn't really put me off - pretty much every theory has been so used at some point in time and using one in such a way is pretty much irrelevant to its truthfulness.
The uncertainty argument is interesting, certainly. It may well be that predictability is impossible. Free Will, on the other hand, still seems to me to be a meaningless statement when applied at a high level.
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And quantum mechanics makes things probabilistic. But it doesn't give you a choice.
You're wrong, but....
From what I've done with molecular dynamics on comparatively small systems, simply modelled, I'd say that there are some things we simply can't calculate if only because the energy state difference between two or more intermediate stages is less than the uncertainty in the background - and by the time you scale up from the molecular to the macro level, any form of predestination is right out the window.
Re: You're wrong, but....
The uncertainty argument is interesting, certainly. It may well be that predictability is impossible. Free Will, on the other hand, still seems to me to be a meaningless statement when applied at a high level.