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