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