[webmaven]

It's true that the quantum mechanical influence amounts to randomness, but you're missing that this (weak) randomness is constantly being injected into biological processes and amplified, it isn't a "one and done" random seed. So it isn't true that the consequences of living systems can be modeled and computed deterministically, even in principle. And this is even less true of intelligent systems like brains.

Whether that stochasticity amounts to free will is a separate discussion, but it is fairly clear to me that many of our decisions are consequential and AREN'T predetermined. Which at least sounds like free will, or close enough to warrant being treated as such, anyway.