Among states of affairs, there are some that (i) occur, and (ii) are not propositions. Furthermore, among these states of affairs, some (iii) entail contingent intrinsic properties that may be exemplified only by individual things.[4] Chisholm says that an event is a state of affairs that satisfies all of these conditions. These are intended to play the role in Chisholm’s ontology that concrete individual events play in the ontologies of philosophers who accept concrete events as fundamental entities.