Comment on How about the digestive system?

ImgurRefugee114@reddthat.com ⁨1⁩ ⁨day⁩ ago

• SpaceNoodle@lemmy.world ⁨1⁩ ⁨day⁩ ago

  You could make infinite indentations in an object with zero holes. That’s a very poor definition for a hope topologically.

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  • ImgurRefugee114@reddthat.com ⁨1⁩ ⁨day⁩ ago

    I’ll give it a try and get back to you

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  • Tlaloc_Temporal@lemmy.ca ⁨1⁩ ⁨day⁩ ago

    And yet each indentation could hold something, like cheese or a kitten, so each indentation in functionally different from a smooth surface.

    Deforming a shape changes it, thus topology is a special case of specifically ignoring most aspects of a shape.

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    • SpaceNoodle@lemmy.world ⁨1⁩ ⁨day⁩ ago

      But more importantly, calling any indentation a “hole” is a case of specifically ignoring the special significance of actual holes. You can’t pass through an indentation.

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      • 0ops@piefed.zip ⁨1⁩ ⁨day⁩ ago

        Guess I can’t dig holes either

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      • Tlaloc_Temporal@lemmy.ca ⁨1⁩ ⁨day⁩ ago

        That’s why we have the compound word “through-hole”.

        90% of important parts on living things are pockets and manipulations of surface area, two things completely ignored by topology. Topology is interesting mathematically, and has meaning for traversal and knot problems, but it’s not really useful to describe reality.

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      • aMockTie@piefed.world ⁨1⁩ ⁨day⁩ ago

        If you were to tell an average English speaker that you were going to dig an indentation, chances are high that they would misinterpret your meaning.

        On the other hand, if you told them that you were going to dig a “blind hole,” I imagine they would have a much better understanding of your meaning and you would still be technically correct.

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  • MacAnus@sh.itjust.works ⁨9⁩ ⁨hours⁩ ago

    Openings and indentations aren’t the same thing though, are they?

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    • SpaceNoodle@lemmy.world ⁨9⁩ ⁨hours⁩ ago

      Correct, a hole is a topilogical feature.

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  • blackbrook@mander.xyz ⁨1⁩ ⁨day⁩ ago

    But it’s a good definition if you are, say, putting a thing into each indentation. That’s why the two definitions are different.

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    • SpaceNoodle@lemmy.world ⁨1⁩ ⁨day⁩ ago

      Right, those wouldn’t be holes.

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      • blackbrook@mander.xyz ⁨12⁩ ⁨hours⁩ ago

        You seem to not be getting that words can have multiple (even if related) meanings. When some science or other discipline takes a common word and defines it really precisely for their purposes, that doesn’t change the definition of the common word for all usages and mandate that all lay people use it only with that discipline’s more precise definition.

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• Smoogs@lemmy.world ⁨1⁩ ⁨day⁩ ago

  It’s ok, the people who tell you that weren’t invited to any of the parties either.

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• Akasazh@lemmy.world ⁨18⁩ ⁨hours⁩ ago

  I love the unabashed sharing of topical knowledge, so you’re welcome to my party.

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• stupidcasey@lemmy.world ⁨1⁩ ⁨day⁩ ago

  That’s right you’re not let me help:

  "The colloquial cloaca meaning is different from a topological Topsy-turvy definition. Anything with a through-hole has a hole at each end^snickering^. It’s an ambiguous GAY question because the answer depends whether you’re referring to a openings in the face of the object^more-snickering^ (a cylinder in the case of a straw)^obviously-unnecessary^ or the void connection the surface openings. Perhaps the safest most radical answer is inclusive, so three. I’ve been told I’m not fun at parties.’

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