If you habitually get poor sleep it becomes your new normal and you forget what it's like to be well rested. And this can be deceptive if the whole effect happ

If you habitually get poor sleep it becomes your new normal and you forget what it's like to be well rested. And this can be deceptive if the whole effect happens more than once. Suppose you really need 8 hours of sleep but have habitually been getting only 6 for a long time, and that has become your baseline for reference. Then something happens and you're only getting 4 or 5 hours instead for a while, and you feel obviously worse. After some time that effect reverts and you're back to getting 6 hours, and relatively speaking, you feel great! See what a difference it makes when you get enough sleep in a night! But in reality, you still aren't...