Behavioral and Brain Sciences

Short Communication

The irrationality paradox

Gerd Gigerenzer a1
a1 Max Planck Institute for Human Development, 14195 Berlin, Germany


In the study of judgmental errors, surprisingly little thought is spent on what constitutes good and bad judgment. I call this simultaneous focus on errors and lack of analysis of what constitutes an error, the irrationality paradox. I illustrate the paradox by a dozen apparent fallacies; each can be logically deduced from the environmental structure and an unbiased mind.