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