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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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[-] RGB3x3@lemmy.world 1 points 1 year ago

No, but that's two holes. And it's because the holes are not connect by a single, unbroken cylinder. It's the material at the edge of those holes and the 90° turn at the corners that makes the holes disconnected.

[-] blazerboy65@lemmy.world 1 points 1 year ago

The edges and corners mean nothing for the purposes of counting holes. Counting holes is a concept of topology that relies on continuous deformation. All non-opening features of the object just get squished and stretched away in the process of identifying holes.

For the purpose of counting holes a can with two openings punched into it is equivalent to a donut which we know has only one hole.

this post was submitted on 04 Jul 2023

164 points (93.2% liked)

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