On Sun, Oct 13, 2024 at 9:34 AM Alan Grayson <[email protected]> wrote:
*> I'll have to read it again, and again, and possibly again, since I do > not as yet understand it, and how you reached your conclusions at the > end. CMIIAW, but non-local means instantaneous action at a distance, so I > don't see from your long post how you conclude that the future can > influence the past. AG* *Alice and Bob are in two spaceships not moving with respect to one another and they synchronize their clocks. They both have a magic gadget allowing them to send messages instantaneously, and they agree that when Alice's clock reads exactly 2 hours she will instantaneously send a simple arithmetic question to Bob that she will only pick seconds before she sends it. Bob will then instantaneously send the answer to Alice. They shake hands then Bob accelerates away at 86.6% the speed of light but Alice does not. At that speed Bob's clock moves at only half the speed of Alice's.* *Just seconds before Alice's Clock reads 2 hours she rolls a pair of dice to obtain two numbers and then sends the following instantaneous message to Bob "how much is 11+3" and she sees Bob receiveing the message at time two hours on her clock because the message is instantaneous. But Bob's clock is only running at half the speed of Alice's clock because he is going at 88.6c, so Bob receives Alice's message and sees Alice receive his instantaneous answer "14". Bob sees Alice get the answer to her question one hour before she decided what exactly the question would be!* *You could make this thought experiment even more dramatic by giving a young William Shakespeare a copy of all his published works before he had written anything, but then where did the information contained in those plays and poems come from? Something does not compute! I must conclude that to avoid logical contradictions either sending messages instantaneously is impossible, in which case physics is local, or doing so creates a new branch to the multiverse. * * John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* snc -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAJPayv367R%3DWG9QaHgvmatGSWZxvQgnbvrMj%2Bzm9b97T1z41Ow%40mail.gmail.com.
