“If it looks like a duck, and quacks like a duck, we have at least to consider the possibility that we have a small aquatic bird of the family Anatidae on our hands” (Douglas Adams)

I will tentatively suggest a possible identification of the approach of Jonathan Holland and myself  to the study of Penrose limits and a particular member of a family of theories developed over the past seven years primarily by Mathematical Physicists, bearing in mind the contrary words of the Marx Brothers:
"He may look like an idiot and talk like an idiot, but don't let that fool you. He really is an idiot."