the brain to me is very simple first ill tell yuo main difference between computers and us we can learn and we also have sense that work all the time all a computer has is a disk drive while we have eyes to pick up light, ears to feel vibrations of sound, noses to pick up chemicals in the air to interpret its state to us, taste to tell wether what we consume is safe, feeling to give us information on temperature, if anything touches us, and even for reproduction. computers only take in information by what we give it, and only thinks if we want it to think, it remembers all that it has learned unlike humans where memory strength depends on stimulation. we can know we are we by have electromagnetic impulses in our brain, which is created by our senses as a computer uses an outlet for power without our sense or without energy from food we can not exist as a consciousness.