"If you've ever had to recall your past in some way and you open a drawer of old photographs that your parents kept, there are always pictures of you smiling and charming, and then a bunch of people you don't know who they are. Could be aunts, uncles, could be the postman for all you know. Who are these people? Your parents are never in the picture, because they are the ones taking them. So you've got these unrelated images that are disconnected from your memories."