Sure, he explains it here. All his interviews on Closer to Truth are worth watching, but then I'm a fan of the show. I don't know if the idea was original to him.
Thanks, I'll also watch it later. It initially reminded me of Tegmark's levels of parallel universes (http://arxiv.org/abs/astro-ph/0302131) whose highest is one that assumes mathematical reality is the same as physical reality.
https://www.youtube.com/watch?v=PUbANEalnzc