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