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