 In addition to being invoked in debates between internalists and externalists, Blair’s studies have also played a role in philosophical discussions of the conditions under which people are morally responsible for their behavior. Neil Levy has argued that psychopaths “ought to be excused moral responsibility for their wrongdoing” because their “failure to grasp the moral/conventional distinction” indicates that they do not understand “what makes a moral norm moral” (Levy 2007b: 163–164).