Some memories come with a very compelling sense of truth about them. And that happens to be the case even with memories that are not true.

To know whether you can trust a particular intuitive judgment, there are two questions you should ask: Is the environment in which the judgment is made sufficiently regular to enable predictions from the available evidence? The answer is yes for diagnosticians, no for stock pickers. Do the professionals have an adequate opportunity to learn the cues and the regularities? The answer here depends on the professionals' experience and on the quality and speed with which they discover their mistakes.

The idea that you can ask one question and it makes the point - well, that wasn't how psychology was done at the time.

Employers who violate rules of fairness are punished by reduced productivity, and merchants who follow unfair pricing policies can expect to lose sales.

In a rising market, enough of your bad ideas will pay off so that you'll never learn that you should have fewer ideas.

We are often confident even when we are wrong, and an objective observer is more likely to detect our errors than we are.

Our comforting conviction that the world makes sense rests on a secure foundation: our almost unlimited ability to ignore our ignorance.