So the problem of existence through time,or persistence through time, shouldn't be called the problem of personal identity,but just the problem of identity.

所以积年累月下来存在的问题，就不该叫做个人认同感的问题，而仅是认同感的问题。

耶鲁公开课 - 死亡课程节选

Persistence doesn't pay off in the game of online shopping for strangers.

CNN: Don't be offended by online-dating rejection

It isn't clear that any single factor is behind the persistence and growth of pickpocketing and purse snatching in many cities.

WSJ: Pickpockets: The Low-Tech Security Risk