Unless is a very common conditional trigger word, and one of the easiest ways to always know you're setting it up correctly is to learn that unless is the same as if not. The if part of a rule goes on the left. And if not is just saying, we'll put the negated version of this on the left. 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.