Gary is high. Gary is big. Alan is short. Alan is small. Harry is smart. Bob is sad. Bob is poor. If someone is not strong then they are sad. If someone is not dull then they are kind. If someone is smart then they are nice. If someone is nice and not bad then they are quiet. If someone is sad and not strong then they are rough. All rough people are little. If someone is short and small then they are bad. If someone is bad and not nice then they are poor. If someone is poor then they are young. If someone is kind then they are clever. All clever people are wealthy. All quiet people are experienced. 
Alan is not young.