I believe there are ghosts among us, but I don't care to read ghost stories. Gauzy figures materializing out of the dark, on the side of the road, bore me. I also don't read science fiction. I have enormous interest in galaxies and the incredible mystery of it all, but none in battling spaceships and pointy-eared aliens. I think it's only logical to accept that we are not the only intelligent life among trillions of planets. So there's no one on the few closest to us. So what? Have you never seen a block with seven empty houses on it? It doesn't mean that no one lives in the city.