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