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