World Science Scholars
22.12 How can each observer say the other’s clock runs slow?

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Klaus Cormann
There are several significant flaws in this story, which would impact, to name a very similar example, the "twin paradox". Transferring this example to the twins, the leaving twin would have to post-process his brother's clock, setting it back conveniently to reach some analogue result as in this example. The key point is that the start, both with the twins as in this example, represents a COMMON frame of reference, which one is leaving. There is no point in suggesting that the partner is moving whilst it should be very clear who the moving part is - both in the twin paradox as here (again) between George and Gracie. The example means stretching relativity beyond the limits.

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