Originally Posted by Steve Jordan
Sure, a brain can be called a "processing device." But its similarity to a machine processor ends there. Just as 2-dimensions are vaguely similar to but so incredibly limited in comparison to 3-dimensions, so the ability to count numbers that is the basis for all machine intelligence is vaguely similar to, but incredibly limited in comparison to, the way the human brain operates. In fact, calling a brain a "processor" at all is a lot like calling the International Space Station a "cave."
A brain and a machine can no more be directly compared to each other than a wheel and a wing can be directly compared to each other. Although both can do much the same tasks, they go about it in markedly different ways.
So using ordinary processors to implement some machine learning to solve a problem what is then the markedly different way that works compared to how the brain works?
The basic unit in the brain also just do something extremely simple like comparing things.