The Sympathy/Pity Con: An attempt to appeal to the other person's compassion to get the other person to give in. Common in children, but also used by adults, an example would be: "All my friends get to stay out late and they make fun of me so can I...". If you have kids you know this one. The Common Sense Con: What does it mean when someone says: "Well, it's common sense, you know"? Usually it means they don't know how to support their position, so they fall back to this completely empty stat...