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.

Researchers who studied a thousand Dutch vacationers concluded that by far the greatest amount of happiness extracted from the vacation is derived from the anticipation period.

If you're going to be unreligious, it's likely going to be due to reflecting on it and finding some things that are hard to believe.

Human beings cannot comprehend very large or very small numbers. It would be useful for us to acknowledge that fact.

There is general agreement among researchers that nearly all stock pickers, whether they know it or not-and few of them do-are playing a game of chance.

I don't try to be clever at all. The idea that I could see what no one else can is an illusion.

A large portion of the weekend effects is explained by differences in the amount of time spent with friends or family between weekends and weekdays.