But in the science fiction story where there's a duplicate,it says, if there's branching,the no branching rule comes in.

但在科幻作品里，复制的案例是存在的，分裂出现时，在无分支的规定下。

耶鲁公开课 - 死亡课程节选

Shelly Kagan Whether I,this person talking to you right now, is Shelly Kagan depends on whether there's some duplicate with all my memories in Michigan or not?

现在和你们讲话的人是不是，取决于是否在密歇根有没有一个,带有我的记忆的复制品存在？

耶鲁公开课 - 死亡课程节选