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