Does anyone really get 8 hours of sleep on any regular basis? What does it really mean to get a "full" night's sleep- how do you know when you've gotten it? And if no one really gets a full night's sleep, whats the point of the idea of it out there? Is it kind of like the food pyramid and suggested daily vitamins, that no one gets either? In case you want to be an optimized person, go ahead and try and get 8 hours of sleep every night. You think walking on the street or meeting in person, that you could differentiate the full night's sleepers from the normal people who only get 7? Are we dying prematurely or killing our brain or something? What are we all missing out on in life by missing that extra sleep? Greatness??