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