Physics is famously non-deterministic. Quantum physics is built on irreducible randomness, it is incompatible with determinism (except for evolutions of probability quasidistributions). And we don't even need to try to find "quantum interactions" in human brain — every physical system is quantum, for every photon that touches retina. There's enough indeterminism to hide entire universes.
Free will is the interplay between determinism and randomness, an emergent phenomenon with multiple self-recursive feedback loops and path dependence. Even if we could trace it through all these loops and find all the mixtures of quantum randomness and classical deterministic patterns it emerges from, it wouldn't make it any less magical.
Free will is the interplay between determinism and randomness, an emergent phenomenon with multiple self-recursive feedback loops and path dependence. Even if we could trace it through all these loops and find all the mixtures of quantum randomness and classical deterministic patterns it emerges from, it wouldn't make it any less magical.