The true sign of intelligence is not knowledge but imagination. Albert Einstein I dont know how much credit we truly give the Joker for his intelligence in The Dark Knight. He masterminds the overthrow of an entire criminal organization, predicting the moves of the cops and populace on the way. He is able to plant bombs seemingly by a snap of his fingers, and has an understanding of psychotics that makes him a magnet to mental patients. For all his laughter and desire to plunge Gotham City into chaos, The Joker is able to do anything he puts his twisted mind to.