[wwweston]

It's not clear how much the brain is like most of the computers even CS specialists or engineers have encountered. Actually, that's putting it mildly. AFAICT it's pretty accurate to say that the brain is about as far from a Von Neumann computer as it is from older favorite analogies like clockwork.

Also, while it's clear the brain can do computation, it's not clear that everything it does is computation.

[sudo_free_cake]

If you take models of computation you will learn anything that can do computation is a computer. A bag of rocks is a computer, you can add and remove rocks to perform computation.