Not disagreeing but doesn’t the second link you posted say five hours? >Based on evidence from over 100,000 studies, the number of people who can survive on 5

Not disagreeing but doesn’t the second link you posted say five hours? >Based on evidence from over 100,000 studies, the number of people who can survive on 5 hours of sleep or less, without showing any impairment, rounded to a whole number and expressed as a percentage of the population…is 0