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