Alan is huge. Alan is strong. Dave is short. Dave is thin. Harry is wealthy. Charlie is poor. Charlie is sad. If someone is not high then they are poor. If someone is not rough then they are kind. If someone is wealthy then they are quiet. If someone is quiet and not bad then they are nice. If someone is poor and not high then they are dull. If someone is short and thin then they are bad. If someone is bad and not quiet then they are sad. All kind people are smart. 
Alan is not dull.