You see, I have a sister who is 8 years younger than I am. I lived in the same house with her for at least 10 years. Yet, I can count on one hand the number of real memories I have of her. I have very clear memories of photos of her, but that is not the same thing. I even have a set of photos I took of her at a special event; and yet, try as I might, I can only get hazy bits of memory about that event. Looking at the pictures does not evoke any real sense of being there. Nor does looking at any of the other pictures I have of her.