""You've still confused the two. What is logic? A system of thought. What are brain functions? That's pretty obvious, they're brain functions. The two are NOT the same thing, although they are related. Most people who've seriously studied anything in philosophy of mind learn these things rather quickly. Logic doesn't "come from" anywhere, that's a nice phenomenological fairy tale, but it's irrational. I also hate to burst your bubble, but mathematics and logic are abstract.""
Logic, my man, is a type of brain function. If this is confusing, let's thro out the term "logic" and replace it with "logic skill", to specify degrees of logical ability. It is a brain function. Not a physical brain function like synapses jolting each other, but a cerabral function, like reasoning, memory, and creativity.
To say mathematics and logic are abstract is absurd in the least. Mathematics is the science of structures and numbers and their relationships to each other. It is as empirical as a discipline gets. Logic is not absract either. It is based on deduction of simple truths, also emperical. The Big Blue computer that almost beat the world's greatest chess player did so because chess is a highly mathematical game, and requires no abstract thinking.
""You keep saying I'm wrong, but it's becoming obvious you know very little about philosophy of mind. You've certainly got yourself twisted around in a mess of fallacies though.""
Philosophy of mind is your baby, not mine. And I'm not sure why it was ever involved in this thread. As far as a mess of fallacies goes, try again.