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