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Any observation can be turned into an interesting question.
(self.showerthoughts)
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. A showerthought should offer a unique perspective on an ordinary part of life.
If you're referring to the "empty set" and asking the question "why is it empty" you should probably step away from set theory for now.