Human beings are not always—in fact, probably not often—the objective, rational creatures we like to think we are. In the past few decades, psychologists have demonstrated the many ways people deceive themselves in the process of reasoning. Cognitive faculties are a distinguishing feature of humanity—lifting humankind out of caves and enabling language, arts, and sciences. Nevertheless, they are also rooted in and subject to influence, or bias, by emotions and instincts.
