The idea that comes after unless is that your purpose is acting in the interest of some other person. Since we are thinking, OK, if not, we're going to say if your purpose is not acting in the interest of another person, then you should not intentionally misrepresent their beliefs. All right, so we have a principle, conditional rule. We used unless, if not, to make sure we set it up correctly. Now we have to think, all right, what does it mean to violate a principle? It means to contradict a conditional.