Edward Witten:
>So where where we've made progress that's been in the string slash M theory framework where a lot of interesting things have been discovered. I'd say that there's a lot of interesting things we don't understand at all.
Graham Farmelo:
>But you’ve never been tempted down the other route. The other options are not.
Edward Witten:
>I’m not even sure what you would mean by other routes.
Graham Farmelo:
>Loop quantum gravity?
Edward Witten:
>Those are just words. There aren’t any other routes

nobody alive today can even compete with the stellar career Witten has had in quantum field theory and higher theoretical physics. why do undergrads think they know better?