[Short post] Computer sleep, really ?

I was just wondering today : why do we humans have to sleep ? To get our brain back in a clean state on the morning after, and perform some heavy-duty memory clean-up tasks. But in this respect, isn’t it more akin to shutting a computer down than putting it in a low-power state ?

If we really have to use biological metaphors, shouldn’t we have used a “rest” (awake, but not doing anything), “siesta” (short nap, mind state is conserved but everything else is shut down), and “sleep” (everything is turned off, heavy maintenance is performed) terminology instead of the “sleep”, “hibernate”, “shutdown” one ?

Just food for thought.

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