Unsurprisingly, some people don't fit well with our limited current understanding of sleep. On the other hand, don't completely discount the possibility that s

Unsurprisingly, some people don't fit well with our limited current understanding of sleep. On the other hand, don't completely discount the possibility that some of the people you know have access to amphetamine. Careful use can sustain performance for weeks before tolerance sets in. Amphetamine abuse shows up a lot in all the places you'd expect -- athletes, military personnel, emergency services and hospital workers, even lawyers. With the pressure to perform, it wouldn't surprise me if it's a quiet problem in startups, too, especially since drug testing is pretty much anathema to the culture.