What is "perdurantism"

n. (context philosophy English) The theory that material objects have distinct temporal parts throughout their existence, rather than being persistent individuals that move through time.

Perdurantism or perdurance theory is a philosophical theory of persistence and identity. The perdurantist view is that an individual has distinct temporal parts throughout its existence. Perdurantism is usually presented as the antipode to endurantism, the view that an individual is wholly present at every moment of its existence.

The use of "endure" and "perdure" to distinguish two ways in which an object can be thought to persist can be traced to David Kellogg Lewis (1986). However, contemporary debate has demonstrated the difficulties in defining perdurantism (and also endurantism). For instance, the work of Ted Sider (2001) has suggested that even enduring objects can have temporal parts, and it is more accurate to define perdurantism as being the claim that objects have a temporal part at every instant that they exist. However, as Stuchlik (2003) states, the stage theory will not work under the possibility of gunky time, which states that for every interval of time, there is a sub-interval, and according to Zimmerman (1996), there have been many self-professed perdurantists who believe that time is gunky or contains no instants. Some perdurantists think this means there are no instants, since they define these as intervals of time with no subintervals. Currently there is no universally acknowledged definition of perdurantism (see also McKinnon (2002) and Merricks (1999)). Others argue that this problem is avoided by creating time as a continuous function, rather than a discrete one.

Perdurantism is also referred to as " four-dimensionalism" (by Ted Sider, in particular) but perdurantism also applies if one believes there are temporal but non-spatial abstract entities (like immaterial souls or universals of the sort accepted by David Malet Armstrong).