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Can we settle this: how many holes does a straw have? (lemmy.world)

submitted 1 year ago by RealNooshie@lemmy.world to c/asklemmy@lemmy.world

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At work we somehow landed on the topic of how many holes a human has, which then evolved into a heated discussion on the classic question of how many holes does a straw have.

I think it's two, but some people are convinced that it's one, which I just don't understand. What are your thoughts?

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[-] paholg@lemmy.one 23 points 1 year ago

A straw is topologically the same as a donut. It absolutely has one hole.

[-] Nemo@midwest.social -3 points 1 year ago

Doughnuts don't have holes, "donutholes" notwithstanding. A doughnut is a torus. If you poke through the side of a doughnut, then it has a hole.

[-] paholg@lemmy.one 1 points 1 year ago

Take a pancake. Put a hole in it. It's now a torus.

[-] Nemo@midwest.social 2 points 1 year ago

Sure, but it's a pancake with a hole in it. Pancakes ought to be disks (which is, topologically, a squashed sphere).

If you put a hole in a doughnut it is no longer a torus. A hole deforms the manifold of an object.

this post was submitted on 04 Jul 2023

292 points (94.5% liked)

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