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A comment on Scientists announce a physical warp drive is possible. Parent comment

Re:Scientists announce a physical warp drive is possible by jfengel on Friday March 05, 2021 @04:19PM (#26362258)
Yeah, it doesn't make sense because it's not correct.

FTL enables a kind of time travel that isn't going back in time to shake your own hand. It allows two people in two different reference frames to disagree about whether A caused B or B caused A. You don't get to go "back in time" but you can send somebody lottery results before they're drawn (from somebody's perspective).

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Re:Scientists announce a physical warp drive is possible by akvadrako on Friday March 05, 2021 @04:34PM (#26362416)
> FTL enables a kind of time travel that isn't going back in time to shake your own hand.

That is exactly what it is. You should read the links above to understand what's being claimed.

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Re:Scientists announce a physical warp drive is possible by diggernet on Friday March 05, 2021 @05:32PM (#26363080)
The links discuss FTL communication implying communicating through time. I haven't taken the time to fully understand the arguments, so for the sake of this discussion I'm willing to simply assume that their conclusions are correct.

Now... Please explain to me how communicating through time will allow you to literally, physically, shake your own hand as was claimed.

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Re:Scientists announce a physical warp drive is possible by akvadrako on Saturday March 06, 2021 @03:32AM (#26366038)
It's the same argument, just instead of assuming one can send information FTL, one can send matter. Or you assume a teleporter exists.
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