Negative numbers also made no sense for centuries and now we teach them to kids as meaning owning some amount of things. The same could be said non-euclidean s

Negative numbers also made no sense for centuries and now we teach them to kids as meaning owning some amount of things. The same could be said non-euclidean space (what is the use in that, right? or complex numbers) but both turned up to be useful in some contexts. Same could be the case with fuzzy logic. Cantor and the different infinite sizes is nonsense to some people but for some reason it is still there in the history of Mathematics. Maybe someone can explain better than me if it is useful, but there is a certain intuition to it that is interesting.