Medical researcher: A survey of more than 1 million adults found that there was a greater frequency of illness among people who regularly slept at least 8 hours a night than among people who slept significantly less
This shows that mild sleep deprivation is not unhealthy and, in fact, probably bolsters the body' s defenses against illness
takes for granted that there will be an observable correlation between two phenomena if either of those phenomena causally contributes to the other