The airline boats are spanking new at the camp in or after early 2005. But yes, not necessarily 2007--just made sense to me that if some had gone back (and popped around in space some) the others simply hadn't.
We don't know who the baby's father is. And some or all of the 1977 people are within their own lifetimes, though not near their other selves (unless the baby's Sawyer).
Re. John & Ben: another maybe. John has to die according to certain parties--Ben not necessarily being one of them. But John continuing to live did mean Ben had no control over Sun's knowing about Jin, therefore over her revenge impulses.
Boone and Charlie older than 27, on crashing? I don't know that either--but it seems like you could rule them out based on their profound irrelevance to the extant plot threads.
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We don't know who the baby's father is. And some or all of the 1977 people are within their own lifetimes, though not near their other selves (unless the baby's Sawyer).
Re. John & Ben: another maybe. John has to die according to certain parties--Ben not necessarily being one of them. But John continuing to live did mean Ben had no control over Sun's knowing about Jin, therefore over her revenge impulses.
Boone and Charlie older than 27, on crashing? I don't know that either--but it seems like you could rule them out based on their profound irrelevance to the extant plot threads.