Except that Galen never questions whether he's a clone or not in the first game. At all. All that he does is note 'huh, thats odd' and then goes on his merry way. Vader never even tries to mind **** him with the 'your a clone' stuff, even when Galen is beating the ever loving shit out of him and causing him mental turmoil would be a really fvcking smart thing to do if he as trying to make him think that as you suggest. If he was trying to con him then how come he never, you know, actually tries to con him?