It used to be thought that rational coherence and metaphysical possibility went hand in hand. Kripke and Putnam put a spanner in the works by proposing examples of propositions which seem to violate this principle. I will propose a nuanced form of modal rationalism consistent with the Kripke/Putnam cases. The rough idea is that rational coherence entails possibility when you grasp the essential nature of what you’re conceiving of. |