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