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