Alan is strong. Alan is big. Dave is thin. Dave is small. Bob is wealthy. Harry is rough. Harry is poor. If someone is not high 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 high then they are dull. If someone is thin and small then they are bad. If someone is bad and not kind then they are poor. All nice people are smart. 
Harry is smart.