I realize how strange this all is--me, here. But I assure you, Sun, I'm the same man I've always been.
That is what Locke said to Sun in "Dead is Dead". What did he mean by saying that? If we are to believe that Jacob's other is fake Locke, then the question is when did he become the shape of Locke?
If Locke is the "same man" he has always been, then he has always been fake Locke?
While re watching old episodes, I suddenly realized how desperate Locke was to remain on the island and it occured to me that the Locke we saw awaken on the beach may not have been "real Locke".
Any feedback? I am open to honest discussion.