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Comment Re:Explaining FTL non-information travel (Score 1) 189

The "solid justification" is that anything faster than the speed of light would, in some reference frame, be equivalent to travelling backwards in time, which would break causality

Which means nothing, since causality can only be determined in the reference frame where the action (i.e. the acceleration) is occurring.
The fact that causality may appear to be broken from some other reference frame is all very interesting, but ultimately irrelevant.

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