"People have always had this craving to know the future. You know, the king used to hire the magician or the forecaster and he'd look in sheep guts, or something, for an answer as to handle the next war. And so there has always been a market for people who purported to know the future based on their expertise. And there's a lot of that still going on — it's just as crazy as when the king was hiring the forecaster who looked at the sheep guts. And people have an economic incentive to sell some nostrum — it can be sold over and over again."