Unraveling LOST

Since tonight's the much anticipated season finale, let's return to LOST... We've already covered time, space, and discussed whether time travelers as 'variables' are doomed to repeat the same mistakes along this incarnation of the journey. If you've been following the show, it appears resident physicist Daniel Faraday was able to alter the future when he created a new memory for Desmond in the present. Tonight's episode finds the survivors in the past grappling with whether to jolt history off course far more dramatically... Jack seems intent to set off the island's H-bomb. If he succeeds, more survivors from the future will probably perish in the past. Hence will they cease to exist in the present? Let's delve into the implications...