There are some ideas so absurd that only an intellectual could believe them.

Possibly a paraphrase of Bertrand Russell in My Philosophical Development (1959): "This is one of those views which are so absurd that only very learned men could possibly adopt them." It is similar in meaning to Orwell's line from Notes on Nationalism (1945): "One has to belong to the intelligentsia to believe things like that: no ordinary man could be such a fool." However, Russell was commenting not on politics, as Orwell was, but on some philosophers and their ideas about language.