Meantime, it remains unclear whether any experiment can ever be done by humans that might reveal some essential predictive inadequacy in either general relativity or quantum theory. Each, supreme in its own domain and haughtily ignoring the other, seems all but invulnerable.
And most people, mindful of this and of their own mortality, prefer to work on things that may reasonably be expected to yield something appreciable over the course of one human lifetime. So would-be quantizers of gravity are never going to be numerous. Which decreases the odds.
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I don't actually think having lots of people working on quantum gravity helps very much: the problem is that they all tend to think similar thoughts, for various obvious reasons.
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It's very daunting to undertake something profoundly obscure and hugely difficult without help -- especially when so many other things worth doing attract so many interesting, stimulating people. Some problems simply get ignored for this reason -- for decades, or even centuries.
End of conversation
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