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