Published online by Cambridge University Press: 01 January 2020
Kripke models, interpreted realistically, have difficulty making sense of the thesis that there might have existed things that do not in fact exist, since a Kripke model in which this thesis is true requires a model structure in which there are possible worlds with domains that contain things that do not exist. This paper argues that we can use Kripke models as representational devices that allow us to give a realistic interpretation of a modal language. The method of doing this is sketched, with the help of an analogy with a Galilean relativist theory of spatial properties and relations.
Apologies to Hilary Putnam for appropriating the title of one of his famous papers (Putnam 1980). My topic is not unrelated to his, but I am not going to talk about his paper. I chose the title because it says what my paper is about.