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