 Suppose we accept that ordinary persisting things have temporal parts. What can we say about the relations which hold between those temporal parts? For example: must the different temporal parts of a single object lie along a smooth trajectory through space and time, or can objects jump about instantaneously, or pop out of and back into existence? Similar questions also arise for endurantists, and not all perdurantists answer these questions in the same way, but for the most part perdurantists do agree on a particular type of answer to these questions. This is because perdurantism is very often held in conjunction with two other doctrines: the doctrine of universalism, and that of Humean Supervenience.