It appears you're not quite grasping this. There is no document defined or titled "The Bush Doctrine." Do you understand this? Can you comprehend this? It is a term coined by Charles Krauthammer, to define the Bush Policy regarding preemptive strike, but later became associated with other aspects of the overall war on terror. In other words, the term "Bush Doctrine" is subjective in meaning, and can be defined in several ways, depending on the aspect you are discussing, and who it's being discussed with. When asked how she felt about the Bush Bush doctrine, Palin didn't respond by asking "what is that?" She appropriately asked Gibson for confirmation of what aspect he was referring to, because it certainly has relevance as to what her answer would be. Just as, if I asked you... "Jarhead, do you like pie?" If you generically answered, "YES!" Then could I assume you like Cow Shit Pies? What if you were allergic to blueberry but loved apple pie? Could you answer my question without asking, what kind of pie? Would your asking me for this clarification mean that you had no idea what a pie was?
Look, I know you guys are trying really hard to get something... ANYTHING... to stick to Palin, but this is about the stupidest thing since the story of her DS child belonging to her daughter. There is no basis for it, and it's not going to fly, because generally informed people know good and damn well, she knows and understands what the Bush Doctrine is, and if they watched the interview, they know good and damn well, she was asking a legitimate question of Gibson, who, like yourself, doesn't seem to have a clue.