Invisibility is the most disturbing aspect of psychopathy. Psychopaths must keep their true nature hidden, and they know how to do it. They're skilled actors and mimics. After all, they can only dupe us if they can first make us believe they're honest, genuine and trustworthy. To do that, they have to come across as normal. Is it possible to identify a psychopath? Yes, if you learn the signs that can help you spot one. From the...