Comment on Nihilism spectrum

• CrazyLikeGollum@lemmy.world ⁨1⁩ ⁨month⁩ ago

  The nostrils are connected to the throat through the sinuses as are the ear canals. Topologically making them all part of the same mouth-anus throughole.

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  • itslilith@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

    Not true, topolgically the route

    left nostril -> sinus -> right nostril

    is another hole. So is

    any nostril -> sinus -> mouth.

    ears have the eardrum, so they don’t count.

    For the more formal definitions of topological holes, look up Betti numbers. What we’re currently talking about is the Betti number b_1. For humans, that is at least 3 (but I’m sure I’m missing many more holes). Unless you’re missing the entire septum.

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