In an ideal reversible computer computation takes zero energy, but irreversible computing where you’re allowed to delete bits takes 0.0175 eV. Wonder if something similar applies to brains. en.m.wikipedia.org/wiki/Landauer%
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Blocking new information and never forgetting (deleting) old information = living in a past bubble = possibly much lower thinking energy. It’s paying attention to new things and deliberately forgetting old things that takes energy.
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nietzsche is one of the few philosophers who had positive things to say about forgetting c.f. timlshort.com/2012/02/04/nie

