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