I think there's something vaguely comforting in wondering if you did ever at some point encounter a ghost. I'm not especially fond of the idea that dead people linger around as fully autonomous versions of themselves in the afterlife, but there is a comfort in wondering if the memory of our existence held by people, places, and moments gets suspended in some sort of "fuzz" that we just happen to interact with sometimes. This makes me want to get a ghost box and test it out in old apartments lol!