Then there was the crackpot category theoretician who thought he was a catamorphism operation. He'd walk around the psych ward with a pair of bananas, which he'd hold up around the other patients and giggle maniacally. Then suddenly the constant function sees a differential operator approaching and runs away. Of course he meets the differential operator after a short distance. But now you aren't supposed to call them contravariant anymore.
Neighborhoods are neighbor victims of society.
It's the Asian Remainder Theorem.