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