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I have read the answers and comments to What predictions can a quantum gravity theory make? and I wonder if anything new can be added since 2014. Today we have an image of the Einstein shadow of the black hole in M87* produced by EHT and the discovery of gravitational waves by LIGO.

my2cts
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    If you think the answers to an old question need to be updated, please offer a bounty instead of duplicating the question. – ACuriousMind Jun 02 '19 at 22:52
  • @ACuriousMind 2014 is a long time ago. I am satisfied with the answers to the 2014 question so I consider it closed. "The questions are the same but the answers are different " Einstein is supposed to have said once. That applies here. I am after the 2019 answers. – my2cts Jun 02 '19 at 22:53
  • @ACuriousMind “Student: Dr. Einstein, Aren't these the same questions as last year's [physics] final exam?

    Dr. Einstein: Yes; But this year the answers are different.”

    https://www.goodreads.com/quotes/226558-student-dr-einstein-aren-t-these-the-same-questions-as-last

     – my2cts Jun 02 '19 at 23:00

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