Hi Alex ... Thanks for reply That's what I got too about what he said re quantum consciousness. And then consciousness is just left undefined. And overall I also got that he was really subtle and honest on the whole issue and it was fascinating watching him put what be thought into words. Really, with Ed Witten, there's so much else going on in a mind such as his! BTW, I just put in a request to Sean Carroll for an interview. Hope the reply's positive!