Interesting. I read about a study (a little more recent, I believe), that concluded that everyone had a 'necessary' amount of sleep that they had to get every night. Nothing new there, but the study shows that if you sleep less than that time you accumulate a sleep deficit (in the the same way bladx would like to accumulate votes).

So getting, say two hours sleep less than you should each weeknight means that by saturday you are functioning about as well as if you hadn't slept Friday night. Naturally if you're tough you can shrug this off for a while, but it's supposed to catch up with you eventually.

I know it caught me eventually. At one point in my studies my classmates actually asked me why I bothered to show to lectures, since I used to come in, sit down and immediately fall asleep (in my screwed state, my poor mind had latched onto the importance of attending lectures without picking up the importance of being awake for them).

I still have a Pavlovian reaction to one lecture theatre. A year later I went to see a Terry Pratchett (great author)talk, walked into said theatre, sat down and FELL ASLEEP.

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Jeremy
I didn't believe in evil until I dated it