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