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