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