||When engaging with a work of fiction we readily imagine all sorts of things, many of which depart from the world as we know it. Moreover, we tend have no trouble imagining such factually deviant propositions; our knowledge that, e.g., there are no such things as hobbits does not get in the way of our imagining the world described by Tolkien. Matters are different, however, when we are asked to imagine morally deviant propositions. If told: "Giselda gave birth to her fourth child," we go along with the author. But if told, "In killing her baby, Giselda did the right thing; after all,
it was a girl," we tend to resist. How to explain this asymmetry has come to be known as the puzzle of imaginative resistance.