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We should have a better definition for the word hole
(sh.itjust.works)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Holes don't exist. It describes a location that lacks the material surrounding it. Kind of like coldness is lack of heat or darkness is lack of light. Cold and dark aren't actual things in the universe.