Two things - a.) the scientific hypothesis that heart rate is elevated via uncontrolled nervous system response in the human body is well accepted versus most economic hypothesis appearing to be post hoc explanations rather than theories that can actually predict the future as he clearly writes the second thing out when critiquing some things his professors said b.) the over stated diagnosis - maybe he's slightly psychopathic or so unfamiliar with Western centric interpersonal culture it doesn't affect him. :)