Comment by Certhas

Nonsense. There was one proposal for relevant quantum effects in brain dynamics, and that turned out to be not relevant. Even if they were, you could substitute all quantum randomness with pseudo randomness and obtain an absolutely indistinguishable object.

But even if this were a debate, its absolutely absurd to claim that the question of determinism in the brain has any bearing on our moral standing. If we discover tomorrow that quantum collapse is deterministic and can be derived from an underlying theory, and thus all of physics is deterministic in the good old fashioned Newtonian sense, this would not affect our moral standing in the least.