Why do we believe people can predict the future? Usually because we remember the hits and forget the misses. Or in some cases, the misses are hidden from us. Like in my favorite "psychic" scam ever, which also happens to be the plot of a classic 1957 Alfred Hitchcock Presents episode, "Mail Order Prophet."
Esther Inglis-Arkell at io9 has a great post today explaining one of the reasons that we believe humans can possess some kind of supernatural psychic ability. It's called survivorship bias, and a version of the concept was brilliantly immortalized by Alfred Hitchcock Presents in the show's third season. A man makes a lot of money with the help of a mysterious psychic but, of course, not everything is precisely as it seems.