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