sentences:  "Perdurantism"—or "perdurance theory"—is a closely related philosophical theory of persistence and identity, according to which an individual has distinct temporal parts throughout its existence, and the persisting object is the sum or set of all of its temporal parts.This sum or set is colloquially referred to as a "space-time worm", which has earned the perdurantist view the moniker of "the worm view".While all perdurantists are plausibly considered four dimensionalists, at least one variety of four dimensionalism does not count as perdurantist in nature.