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Where does the LQG approach stand right now? What are its biggest successes and failures? Does it have any known difficulties that might be "fatal"? What major questions (on the fundamental level) are still open in the approach, and is there "momentum" toward solving them?
In particular, is it possible that LQG + SM + [some simple dark matter candidate] can give a complete and consistent model for all of elementary physics? If not, what is missing?
In particular, is it possible that LQG + SM + [some simple dark matter candidate] can give a complete and consistent model for all of elementary physics? If not, what is missing?