That is because no one knows or sure if he really lived.

VOA: special.2009.02.21

So if you archive it, that's maybe a little hint that either this is just your habit or perhaps that you might actually care about this later in the future, whereas if you delete it, no, you really don't care. Yeah.

如果你把邮件存档，可能暗示这可能,是你的习惯,或者以后还会用到它，相反，如果你删除了它，说明你可能根本不在意这个邮件。

哈佛公开课 - 计算机科学课程节选

So it's almost as if functions really are useless because they have no ultimate effect.

所以几乎是函数是没起作用的,因为它们没有最终的效果。

哈佛公开课 - 计算机科学课程节选

What if there really is no digital economy for the kind of reporting generally thought vital to the functioning of a democracy?

FORBES: Magazine Article

If there really was no alternative the lights would go out all over the UK - just like they did in California in 2000 and early last year.

BBC: Q&A: British Energy's crisis

If there really is no one in the locomotive to stop the Euro train from crashing then there will be a period of giant upheaval and stock market crash.

FORBES: To Save The Euro Germany Must Print Money