There are millions of insignificant events that can't possibly be predetermined.
The predetermined nature of all our choices is exactly what the current crop of the "no free will" crowd says. Their contention is that if we knew the position of every atom and the physical laws that pertained to them, it would be possible to accurately know what would happen next ad infinitum. Just because we don't know how to do that yet doesn't negate the "fact" that there's no free will.
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