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While I'm sure that sleep deprivation will eventually kill you (although I'm not sure if it's at all possible to keep someone from sleeping to that extent), ins

While I'm sure that sleep deprivation will eventually kill you (although I'm not sure if it's at all possible to keep someone from sleeping to that extent), insomnia isn't what kills you in fatal familial insomnia. The killer is prions turning your brain to mush and turning you first into a vegetable, then killing you.

perl4ever 8y ago
It seems (perhaps too) obvious to me, that if sleep didn't perform some vital function in maintaining the body and/or brain, then evolution would have eliminated it due to the disadvantage of being vulnerable and inactive for a large part of the day.