Cognitive biases are psychological tendencies that cause the human brain to draw incorrect conclusions.
Such biasesare thought to be a form of "cognitive shortcut", often based upon rules of thumb, and include errors in statisticaljudgment, social attribution, and memory. These biases are a common outcome of human
thought, and often drastically skew the reliability of anecdotaland legal evidence. The phenomenon is studied in cognitive scienceand social psychology.