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