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There exists functions from Reals to Reals such that the restriction of the function to any non-trivial interval is still surjective.

https://brilliant.org/wiki/converse-of-intermediate-value-theorem/

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

I'm not crazy, my mother had me tested.

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