2 + 2 =

“I admit that twice two makes four is an excellent thing, but if we are to give everything its due, twice two makes five is sometimes a very charming thing too.”
Yakov Guminer - Arithmetic of a counter-plan poster (1931)
[Also translated as “The formula ‘Two and two make five’ is not without its attractions.”]
Fyodor Dostoevsky, Notes from Underground

What do you think?