" Nothing seemed to budge them from their conviction that the man who had been sent to prison was guilty. Even after the test had been performed. Even after the conviction had been overturned. Even after the prisoner had been released from jail. The problem was not the strength of the evidence, which was often overwhelming, it was the psychological difficulty in accepting it. "

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