Recent arguments surrounding possible and impossible worlds have revealed the stakes in the commitment to possibilities. The friends of possible worlds differ from each other on a number of dimensions - there are contrasting accounts of what possible worlds are, and of what explanatory work they can do that the arguments over impossibilities help to bring into focus. This paper attempts to lay out some of the arguments over impossibilities by presenting a dialogue between two philosophers.
Keywords: possible worlds, impossible worlds, philosophy, commitment to possibilities, impossibilities,