The most general instance of predicate describing actors in events (q.v.): all other actor slots are specializations of this predicate. Thus actor is a broad relation that holds between a given event and any contemporary existing thing (see thing existing stably in time) that is meaningfully involved in the event. (actor EVENT ACTOR) means that ACTOR is somehow saliently (directly or indirectly) involved in EVENT during EVENT. An object's merely being cotemporal (see Cotemporal) with an event is obviously not sufficient for being an actor in it, nor is participating (however centrally) in a representation or re-enactment of the event. But note that being an actor in the relevant sense is not restricted to things that play active (as opposed to passive or instrumental) roles in a given event.