Ralph Hull made a reasonable living as a magician milking a card trick he called "The Tuned Deck"...Hull enjoyed subjecting himself to the scrutiny of colleagues who attempted to eliminate, one by one, various explanations by depriving him of the ability to perform a particular sleight of hand. But the real trick was over before it had even begun, for the magic was not in clever fingers but in a clever name. The blatantly singular referent cried out for a blatantly singular explanation, when in reality The Tuned Deck was not one trick but many. The search for a single explanation is what kept this multiply determined illusion so long a mystery.

--Nicholas Epley, "Blackwell Handbook of Judgment and Decision Making"