Comment author: randallsquared 05 October 2009 04:07:04AM 3 points [-]

And it's impossible to sleep too much more than normal; the better rested we are, the harder it is to fall asleep.

This isn't true, as far as I can see. I know several people who have fallen into the habit of sleeping much more than is normal for months or years, with no apparent physiological reason. Also, I notice that when I sleep in, I typically get up because I don't want to waste more of the day, and never seem to have trouble going back to sleep if I choose to do that. For someone sufficiently unmotivated to do anything, I think sleeping for most of each 24 hours would be possible.

Comment author: Carrie 07 October 2009 01:28:48PM 2 points [-]

I think that has less to do with willpower and more to do with the way that most of the developed world has been crazy on sleep-dep since the invention of the electric light.