 Walton’s account of truth in fiction rests on his distinctive account of a work of fiction as a prop in a game of make-believe, where the function of the prop is to prescribe imaginings. Unlike Lewis, he doesn’t place stress on the idea that fictional statements are implicitly prefixed with an in-the-fiction operator. For Walton, a proposition is fictional—true in the fiction—just in case participants in such a game of make-believe are supposed to imagine it as true (Walton 1990; for some recent reservations about this account, see Walton 2013, 2015). There are two types of fictional truth: the primary fictional truths are evident in the work itself, while the implied fictional truths are generated from the primary ones. The problem of how to generate implied fictional truths from primary fictional truths is essentially the problem that Lewis faced, and the principles that Walton describes—the Reality Principle and the Mutual Belief Principle—are close to Analysis  1  and  2,  but without the commitment to the machinery of possible worlds. Letting \(p_1\)… \(p_n\) be the primary fictional truths of fiction F, the Reality Principle holds that it is true in F that q iff had \(p_1\)… \(p_n\) been the case, q would have been the case, while the Mutual Belief Principle holds that it is true in F that q iff the following was mutually and openly believed in the society from which F originated: had \(p_1\)… \(p_n\) been the case, q would have been the case. 