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