Mid-way through the pieces, I was expecting it to lead towards the theory that, if parts of the brain can shut-down while we're still awake, we could perhaps find a way to just have a small part of us resting at any one time, and never actually need to put our entire body to sleep.<p>While that did seem like a bit of a long shot idea (and frankly I would have been thinking "yeah, nice imagination" had that actually been his ending), I was none-the-less disappointed to get to a conclusion of "you're less effective when tired", something most of us worked out when we were infants without needing any scientific studies.