If you want a real world example of this, think about the third Century B.C., someone can correct me afterwards.

现实世界也有这样的例子,大概在公元前三世纪,如果我说错了请大家来纠正

耶鲁公开课 - 博弈论课程节选

But through technique alone to the extensity even existence cannot be found alone There isn't any or many or much meaning maybe limited cases I don't care.

当时仅仅通过技术,连存在都难以实现,如果这样,有技术也没有什么意义了,或许我举的例子不多。

麻省理工公开课 - 电影哲学课程节选

So similarly,there's going to be hard cases about the very,very early stages.

同样，早期阶段也有这样难以解释的例子。

耶鲁公开课 - 死亡课程节选