If Stalin is evil, then everything he says should be false. You wouldn’t want to agree with Stalin, would you? Stalin also believed that 2 + 2 = 4. Yet if you defend any statement made by Stalin, even “2 + 2 = 4,” people will see only that you are “agreeing with Stalin”; you must be on his side.

— Eliezer Yudkowsky, How to Actually Change Your Mind