> Arrow's impossibility theorem Ah, that's it, thanks, I was looking for it but forgot what it was called. There's also https://en.wikipedia.org/wiki/Condorcet

> Arrow's impossibility theorem Ah, that's it, thanks, I was looking for it but forgot what it was called. There's also https://en.wikipedia.org/wiki/Condorcet_paradox https://en.wikipedia.org/wiki/Condorcet_paradox (and any number of other ones that may or may not even have names)