User blog comment:Argorrath/Black Ops III - Menendez will not be returning/@comment-26299686-20150625175836/@comment-6565193-20150702102323

A very very very very complex thing? You're wrong, we know a lot about the brain, a whole lot. True, we do not know things like why sleep is needed, or why it does some things, but we do know how it does it. Just because we may not know why it does certain things does not mean that nanomachines are impossible to replace those functions.