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