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