I'm am not confident on this at all, but I do think that either Jin or
Claire will indeed die and the other will live.
A couple weeks ago I would have predicted that they both live. I've
kinda changed my mind on that.
But Claire seems to have a lot of story left to tell with her weirdness
last week.
And I still think Sun thought there was a small smidgeon of a change
that Jin would show up at the birth, which implies that she thinks he
might be alive.
But, yeah, I'm wildly predicting one of the two will die. But not both,
exactly one.