" What was going on? The only way to make sense of this exchange is through the prism of cognitive dissonance. Many prosecutors see their work as more than a job; it is more like a vocation. They have spent years training to reach high standards of performance. It is a tough initiation. Their self-esteem is bound up with their competence. They are highly motivated to believe in the probity of the system they have joined. In the course of their investigations, they get to know the bereaved families well and quite naturally come to empathize with their trauma. And they want to believe that in all those long hours spent away from their own families pursuing justice, they have helped to make the world a safer place. Imagine what it must be like to be confronted with evidence that they have assisted in putting the wrong person in jail; that they have ruined the life of an innocent person; that the wounds of the victim’s family are going to be reopened. It must be stomach churning. In terms of cognitive dissonance, it is difficult to think of anything more threatening. "

― Matthew Syed , Black Box Thinking: Why Some People Never Learn from Their Mistakes - But Some Do