Harry is high. Harry is big. Dave is thin. Dave is short. Gary is wealthy. Bob is dull. Bob is rough. If someone is not strong then they are dull. If someone is not bad then they are nice. If someone is wealthy then they are quiet. If someone is quiet and not poor then they are smart. If someone is dull and not strong then they are sad. All sad people are tiny. If someone is thin and short then they are poor. If someone is poor and not quiet then they are rough. If someone is rough then they are young. If someone is nice then they are kind. All kind people are clever. All smart people are old. 
Gary is not old.