What scientific idea is ready for retirement? Steve Giddings: "Spacetime. Physics has always been regarded as playing out on an underlying stage of space and time. Special relativity joined these into spacetime... [...] The apparent need to retire classical spacetime as a fundamental concept is profound..."
https://www.edge.org/response-detail/25477
Space-time is a corollary of Einstein's 1905 constant-speed-of-light postulate. If space-time is wrong and should be retired, then the postulate is false. Logic forbids the combination (true postulate, wrong corollary).
Nima Arkani-Hamed: "Almost all of us believe that space-time doesn't really exist, space-time is doomed and has to be replaced..."
https://youtu.be/U47kyV4TMnE?t=369
"We've known for decades that space-time is doomed," says Arkani-Hamed. "We know it is not there in the next version of physics."
http://discovermagazine.com/2014/jan-feb/10-shaping-the-future-of-physics
So space-time does not exist and is not there in the next version of physics but LIGO's gravitational waves, ripples in the nonexistent space-time, do exist and WILL be there in the next version of physics? The Cheshire cat is not there but his grin is:
https://images-na.ssl-images-amazon.com/images/I/51J-7PIffiL.jpg
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Pentcho Valev