Eight Hours Daily Sleep:: Is this compulsory for Optimum Performance or a threshold programmed by human Self???

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Image Source:Pexels.com: FreeStock:Marcus Aerelus

Does Sleeping less than Eight hours daily negatively impact on your performance subsequent day??

Why does other folks sleeps less than the recommended without any noticeable variance in productivity??

Are our resourcefulness programmed by Self or Nature ?? WHY??

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