It is a fusion of all the perdurant's instantaneous time slices compiled and blended into a complete mereological whole.
Katherine Hawley in How Things Persist states that change is "the possession of different properties by different temporal parts of an object".
The complete view of the apple includes its coming to be from the blossom, its development, and its final decay.
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).
With this alternative four-dimensionalist persistence theory, however, ordinary objects are no longer perduring worms but, rather, are wholly present instantaneous stages.
Worm theory seems to require that we currently experience more than a single moment of our lives; that we actually find ourselves experiencing only one instant of time is argued to be more in line with the stage view.
Contemporary perdurantists disagree, arguing that the "worm" is a fusion of all the perdurant’s instantaneous time slices compiled and blended into a mereological whole.
By noting when there is a similarity amongst sortals and that there are adequate causal relations held between them, exdurantists avoid vagueness the best they can.
Some perdurantists think the idea of gunk means there are no instants, since they define these as intervals of time with no subintervals.