It functions as a regularizer in learning and reduces unnecessary energy use. | Hacker News

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		visarga on Oct 27, 2016 \| parent \| context \| favorite \| on: Evidence that birds sleep in mid-flight It functions as a regularizer in learning and reduces unnecessary energy use.

stucat on Oct 27, 2016 [–]

While those are benefits of sleep, I don't believe we consider them to be the reason we sleep.

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