This way of conceiving events yields certain (possibly surprising) results. For one, every event occurs. For another, events happen at times and places. Furthermore, as Chisholm sees it, when an event occurs, there must be some individual thing or things somehow participating in the occurrence of the event. These are the things that have the properties entailed by the event. The event is said to be “concretized” by those things. Finally, events may recur. John’s walking occurs when and where John walks; it occurs only if John has the property of walking. It can occur on many different occasions and in many different places. It may be an effect of some causes, and it may be a cause of some effects. Chisholm goes on to discuss the role of events in perception, causation, and explanation.