A paradox is a persuasive argument that something, which we judge must be false, is true. Zeno’s Paradox, for example, is a convincing argument that it’s impossible to move. Paradoxes are valuable in philosophy because they help us become aware of forms of argument that are deceptively convincing yet logically fallacious. John and Ken are joined by Roy Sorensen from Dartmouth College, author of A Brief History of the Paradox, to consider what we can learn from paradoxes.