We understand parts of the brain classically. There are parts of the brain that operate like organic circuits of boolean operators.
There is no quantum level magic.
There is no quantum level magic.
1.) The brain is some sort of quantum computer (almost certainly false)
2.) The brain as a physical system is somehow sensitive to quantum uncertainty, for example, in the probability of a neuron firing when stimulated. We might hypothesize that this explains our subjective experience of free will: we might be able to chose our world in the sense of the many worlds interpretation, but the worlds we're limited to are just different patterns of deterministic activity within the brain. This is very speculative, but appealing, and I think it deserves more consideration.