 Change of Mind. I can’t, strictly speaking, change my mind about any particular proposition, since if I went from believing, say, “Dogs are good pets” to believing “Dogs are not good pets”, what I mean by “Dog” and “Pet” would have changed. As a result, there is no proposition that I previously thought to be true that I now treat as false. However, since the most natural way to make sense of changing one’s mind about something is in terms of changing the truth-value one assigns to a single proposition, the intuitive notion of change of mind seems lost. (Fodor and Lepore 2002)