“Real, she imagined later on, was something else; it had nothing to do with things you could touch. Real was being seen, noticed, acknowledged, and later remembered. Real was people thinking about you when you weren't in the room. If others thought about you, then you must be more than a made-up dream. You need other people to be real, she decided. Otherwise you might just be a speck, an atom, inventing an elaborate story. It seemed like a paradox, but it must be so. She knew other people were real by thinking about them. Her thinking of her parents and her brothers, her school friends, were proof that they were real. They were both outside and in her head. But how could she be sure she was in anyone's head?”