One person has been described by a neighbor as follows: "Steve is very shy and withdrawn. There is always willing to help, but not too much interested in people or reality. He is a decent man and meek, no need to order and clearly defined structure, is very attentive to detail. "

Who is Steve: librarian or a farmer?

The above example, quoted by Daniel Kahneman'a shows how the heuristics. At first glance, the description fits this stereotype of how we imagine a librarian. But really, no hard evidence does not indicate that Steve works in the library. Moreover, in America at one librarian for more than 20 farmers. Thus, Steve, of course, can be a librarian, but statistically more likely it is that he is a farmer.