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