"Much of the uncertainty in individual decision making comes from not knowing what we really want to achieve through the decision, and from our tendency to exaggerate both potential losses and potential gains. People buy lottery tickets and play the slot machines at casinos, despite the fact that the casino owners and the lottery managers aren’t in business to give away money.…Hopeful gamblers (and the writers of lottery advertising) are fond of pointing out that, after all, someone does win. That’s exaggeration of potential gain, because it doesn’t mean that you have a realistic chance of winning. On the other side of the coin, exaggerated fear of harmful effects keeps some parents from immunizing their children against disease, leads them to throw away their electric blankets, and makes them demand that schools root out harmless asbestos in the walls, which would usually have been better left alone. We are terrified of trivial risks, and spend billions in futile efforts to control them. That’s exaggeration in the other direction. Both expectations of gain and fears of loss are far too often overblown, to the detriment of balanced decision making."