Fred sent in this article from the BBC. We know that sleep impairs judgement generally, but this study would seem to indicate that if affects moral judgement. The study was carried out on soldiers who stayed awake for 53h straight. Apparently, after being awake for 2 days, they even changed their view on what is morally acceptable. And if it is possible to take drugs to keep performing without sleep - I wonder what that does to your moral judgement...
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