This is pretty bad news for those who can't stay asleep. Sometimes I'll try to sleep for, say, 3 hours, then my alarm will wake me up and I'll decide to sleep l

This is pretty bad news for those who can't stay asleep. Sometimes I'll try to sleep for, say, 3 hours, then my alarm will wake me up and I'll decide to sleep longer. I guess I'll have to stop doing that. Kind of seems like it's pretty difficult not to negatively impact cognition in one way or another.