Redemption for Claire (Spoilers)?

[Mojochi]

I believe the question was meant to be: does Jack know that Claire is alive and well on the island?

I think 'well' is a bit of a stretch

& No, I think it's still a problem, because Claire might never have let go of belief in the psychic guy telling her only she could raise Aaron. To her, all that might have been ruined now. I'm just guessing though

 

[Mojochi]

I do believe Jack realizes Claire is on the island. I mean, they left her there, & Kate at some point tells him that's why she's going back

I'm pretty sure he knows she's there, but doesn't know bugger all else, yet. Boy, is he in for a surprise