The ideological Turing test (sometimes called the political Turing test^[1]) is a test of a person's ability to state opposing views as clearly and persuasively as those views are stated by their proponents. The test was originally proposed by Bryan Caplan,^[2] in analogy with Alan Turing's "imitation game"—more widely known as the Turing test—, which measures a machine's ability to exhibit intelligent behaviour indistinguishable from that of a human.