Why would Widdemore bring Desmond to the island to "save the world" when Desmond was in fact the only person that could destroy the island (and allegedly free Smokey)?
And if Desmond was the only person who could enter the cave and turn on/off the magic fountain then how was Jack able to put the cork back in? Why didn't Jacob just tell Jack what to do, instead of having Widdemore bring Desmond back?
