I'm not convinced that Hawking can do anything other than drool at this point. I saw a History or Discovery Channel show on the guy and he can't even type into his voice machine anymore. Anything Hawking "says" has to be pre-programmed into the voice box prior to an appearance.
He has a full-time theoretical physicist guy that hangs out with him all the time that supposedly interprets his grunts and eye movements to figure out what he's trying to say.
So I'm guessing any new theory he puts forth is largely the assistant's theory with Hawking's name attached to give it some kind of weight.
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