Alan is strong. Alan is big. Erin is thin. Erin is small. Gary is wealthy. Anne is rough. Anne is poor. If someone is not huge then they are rough. If someone is not bad then they are kind. If someone is wealthy then they are quiet. If someone is quiet and not dull then they are nice. If someone is rough and not huge then they are sad. If someone is thin and small then they are dull. If someone is dull and not quiet then they are poor. All kind people are smart. 
Alan is not sad.