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