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