> the number of people who can survive on five hours of sleep or less without any impairment, expressed as a percent of the population and rounded to a whole nu

> the number of people who can survive on five hours of sleep or less without any impairment, expressed as a percent of the population and rounded to a whole number, is zero. Pretty deceiving claim, the author starts with "the number of people", but gives a rounded down percentage instead the point would be perfectly clear as "only 0.X% of people ..."