But seriously, I think there is cause for discussion on this one on both a philosophical and neurological basis.
The former would have to do with the word "use" in this context. Do we use that part of our brain that "dreams" or does it use us.
Of course, new neurological studies using functional MRIs have shown that we do "use" certain areas of our brains while attempting to accomplish some things and others while involved with different tasks... So how much of our brain is consciously provoked and how much is sub-conscious...I'll bet there is plenty of study material on the brain that would make a normal brain go unconscious.
Oh, if it were only true in Washington, DC! 90% of the politicians are brain-dead.