Just a couple of thoughts
The only person 'the rules' don't apply to appears to be Desmond. Think it's safe to say that he will make a return to the island at some point. The 'eye' shot at the cabin looks damn like him too. Is it possible that he returns to the island at some point pre 815 crash and attempts to right a few wrongs. At some point becoming trapped by Ben. The Others/Hostiles would surely welcome Desmond into their ranks given his knowledge and abilities. Damon Lindelof said that the role of Jacob had not yet been cast, though we've seen someone who would appear to be Jacob. What if the role is only 'cast' once Desmond returns to the island and takes the name Jacob (as in Sawyer picking LeFleur) thus the role is born.
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