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)?
i don't think anyone really knew smokey's true plans. chuck probably thought he could sacrifice desmond to kill smokey in a plan he never had a chance to hatch, cuz ben shot him.
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?
i assume desmond was the only person who could remove the magic cork, as he had to wade through and the magic pee water. when jack was in the cave, there was no magic pee water to speak of.
