 The debate over persistence through time centers around two rival views, endurantism and perdurantism. Endurantists often say that a persisting material object is temporally unextended and in some sense ‘wholly present’ at each instant of its career. Perdurantists often say that a persisting material object is a temporally extended entity that has a different temporal part at each different instant of its career and is at most partially present at any one instant.