Gerd Gigerenzer

Science has not one method, but many. These include observation in the natural world, experimentation in the laboratory, mathematical proof, computer simulation with real data, analysis of surveys and demographical statistics, and thought experiments for the great geniuses, such as Galileo and Einstein.

Omniscience, omnipotence, and determinism are ideals that have shaped many theories of rationality.

Blaise Pascal and Pierre Fermat have been credited with this more modest view of rationality, defined as the maximization of the expected value, later changed by Daniel Bernoulli to the maximization of expected utility

Optimization refers to a strategy for solving a problem, not to an outcome. An optimal strategy is the best for a given class of problems (but not necessarily a perfect one, for it can lead to errors). To refer to a strategy as optimal, one must be able to prove that there is no better strategy

Models of search specify a searching direction (where to look for information) and a stopping rule (when to stop search).

The structure of natural environments, however, is ecological rather than logical.

The adaptive toolbox contains the building blocks for fast and frugal heuristics.