Gary is strong. Gary is huge. Dave is small. Dave is little. Anne is wealthy. Alan is sad. Alan is bad. If someone is not high then they are sad. If someone is not rough then they are quiet. If someone is wealthy then they are nice. If someone is nice and not poor then they are clever. If someone is sad and not high then they are dull. All dull people are thin. If someone is small and little then they are poor. If someone is poor and not nice then they are bad. If someone is bad then they are young. If someone is quiet then they are kind. All kind people are smart. All clever people are experienced. 
Alan is smart.