• How many holes does a drinking straw have then?

  • Good point. So a pant has either one hole which is bifurcated or two holes which combine into one?

    @Paralucent that’s interesting.

  • two holes which combine into one

    No, three holes (or two holes and a boundary, in 2D space) which cannot combine without fundamentally changing the topology. If you merge two of the holes, you no longer have pants, you have a skirt (or a boob tube, or a leg warmer, or a drinking straw)

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