We all know people in our lives who know how to push all our buttons. We try to be strong, but they know just what to do and say to drive us bonkers. This entry is meant as a catch-all category to deal with people who are generally irritating, frustrating, or abrasive. One may define “impossible people” as those persons who are simply very difficult socially: they do not respond to common social cues, avoid typical negotiation dynamics, evade negotiated points directly by bringing in other irrelevant issues, talk only of their issues and never address yours, have trouble with or cannot focus on the negotiation, react inappropriately emotionally, push on sensitive personal areas, or simply say no to everything much like a child with the oppositional defiant disorder[x]. In rare cases, they may threaten physical abuse in a professional setting. See sections on Narcissistic Personality Disorder and Antisocial Personality Disorder, which are related issues.