sentences:  Four-dimensionalism
  
  In philosophy, four-dimensionalism (also known as the "doctrine of temporal parts") is an ontological position that an object's persistence through time is like its extension through space.Thus, an object that exists in time has temporal parts in the various subregions of the total region of time it occupies, just like an object that exists in a region of space has at least one part in every subregion of that space.