ABSTRACT
In this chapter, the author suggests, in a rough way, what amounts to a starting point for a criterion of identity for events based on that idea of events as changes. He offers certain definitions, framed in the light of what he take to be the relation between scientific theories and events and quality spaces. Despite whatever uncertainties or unclarities there may be concerning the notions of the time and the place of the occurrence of an event, it is clear that occurrence at the same time and at the same place is a necessary condition for the identity of events. E. J. Lemmon suggested spatio-temporal sameness as a condition of identity for events, and saw that that suggestion would result in a collapsing of the categories of events and physical objects into one category of spatio-temporal particulars. Scientific theories are theories about what the ultimate quality spaces are through which ultimate objects move when they change.
