 Another example to illustrate the idea: Gennaro looks in a mirror, thinking he’s looking through a window, and sees flames creeping up the pants leg of the person he sees in the glass. At first he says, “that guy’s pants are on fire”, and is in the “that guy’s pants are on fire” belief-state. He thereby comes to believe the traditional proposition that Gennaro’s pants are on fire. Then he realizes what’s happening, and comes to be in the “my pants are on fire” belief-state. There’s no change in which propositions he believes—he’s still belief-related to the traditional proposition that Gennaro’s pants are on fire. But because he’s now belief-related to that proposition by way of the “my pants are on fire” belief-state, his behavior changes.