This is great. Pei really impresses me, especially with the linked paper, “The Assumptions of Knowledge and Resources in Models of Rationality”. If you haven't read it, please read it. It clarifies everything Pei is saying and allows you to understand his perspective much better.

That said, I think Luke's final rebuttal was spot on, and I would like to find out whether Pei has changed his mind after reading "Superintelligent Will".