>Another argument against my viewpoint is from people who cite studies on
>one's inability to operate heavy equipment safely for long periods of
>time after little sleep.
Not having 8 uninterrupted hours of sleep is not the same as
little sleep. I, too, beleive that we were not designed
for 8 hours of uninterrupted sleep. We have periods of deep
sleep and periods of lighter sleep, during which it
doesn't take much to wake us momentarily (or long enough
to use a bathroom or check on the kids) and then we go
back to sleep.
  Naomi Bar-Yam

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