Research has shown that physical experiences can influence metaphorically related judgments. For example, the experience of physical weight influences estimates of value and importance. Careful examination of existing evidence suggests that how much knowledge people have about a target of a judgment determines whether the experience of physical weight influences that judgment. Three studies directly test this hypothesis, finding that participants evaluated a book as more important when it was heavy (due to a concealed weight), but only when they had substantive knowledge about the book. In...