I listened to a podcast of Carlton Cuse and Damon Lindeloff and they both said to all the fans out there that are coming up with new theories of "purgatory" and "every one beign dead" should stop thinking those theories up. They also said that they never really give a lot of secrets away but what they will give away is this and i quote, "Out lost friends are NOT dead, and NOT in purgatory or anything of that sort".

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"You Don't Even Know What Your Running From!"-Jack