That's the crucial premise.

这是决定性的前提
And of course,

当然就我所知
we don't have any good--as far as I can see--we don't have any

我们没有足够的理由
good reason to believe that crucial premise.

去相信这个决定性前提
You might ask though, is there some other behavior,

你也许会问有没有其它行为
something else that should tip us off, could tip us off,

能就我们是否相信自己真的会死这一问题
as to whether or not we really do or don't believe that we're going to die?

给予我们一点启发呢
Well, here's the best that I can do.

以下是我能想到的最好的行为
This strikes me as the most plausible contender for an argument like this.

这是我个人认为对此问题最好的论证了
As we know, there are people who have brushes with death.

我们知道有些人曾和死神擦肩而过
They might be, for example, in an accident, and come close to being killed,

例如在一场事故中差点丧命
but walk away without a scratch.

最后却毫发无伤