 There are various responses to this difficulty. Endurantists are not usually tempted by Humean Supervenience, since they are committed to facts about identity between objects wholly existing at different times, and these identity facts are not easily reducible to moment-by-moment facts. So some take the difficulty for Humean Supervenience to be a reason for adopting endurantism. Some perdurantists stick with perdurantism, but reject Humean Supervenience. Instead, they accept that some facts about persisting objects cannot be reduced to facts about their briefest temporal parts; they may accept, for example, that causal relations between earlier and later parts are irreducible in this way. Finally, some perdurantists insist that the supposed facts which seem to cause problems for Humean Supervenience are not real facts after all.