I tend to use their reaction when I say "everyone should be immortal". Strangely enough it does seem like you need an abnormal clarity of thought to reliably come to the right conclusion about death.

I see this general idea espoused by rationalists rather often. But despite my months on here, I have yet to change my mind into agreement on this.

Aumann's Agreement Theorem leaves us with three options:

1. The vast majority of LW-ers are irrational (I rather doubt it)
2. I am not as rational as I would like to be (I'm sure of it)
3. We do not have common priors (I do think that most anti-deathists are very privileged in terms of: intelligence, wealth, stability, etc)