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