"This was a hugely significant attack plan. With that number of aircraft, with the types of destination that were being talked about, it is conceivable to think of upwards of 2,000 casualties in the air depending on the point of detonation whether others would have been caught on the ground as well.

VOA: standard.2009.09.07

That is,we think it's conceivable that somebody could, at some level,not really believe they're going to die.

就是说假设确实有人，在某种程度上不相信自己会死亡。

耶鲁公开课 - 死亡课程节选