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