For the very productive, I think there's a tendency to think oneself exempt from the rules of sleep. But only for "a small group of people—perhaps just 1% to 3%

For the very productive, I think there's a tendency to think oneself exempt from the rules of sleep. But only for "a small group of people—perhaps just 1% to 3% of the population" is sleep a waste of time according to researchers. http://online.wsj.com/article/SB10001424052748703712504576242701752957910.html http://online.wsj.com/article/SB1000142405274870371250457624...