#### Neddy Bate

**Valued Senior Member**

And with a very brief (non-instant) turnaround: explain to me how it is possible that her clock's tickrate "suddenly accelerates" instantly due to Charlie making his turnaround many many lightyears away.

Here is the explanation you keep asking for, and I keep giving you:

Charlie's plane of simultaneity shifts when he turns around. This causes Charlie himself (not Alice) to conclude that Alice's time is currently at a different time than it was before.

The calculations are correct, but the interpretation that Alice jumps forward in time from t=10 to t=70 [or that her tickrate accelerates] due to Charlie's turnaround is wrong.

This is your strawman. I have never said that Alice herself experiences anything due to Charlie's turnaround. It is Charlie who experiences the change in Alice's clock position & rate etc.

(Needy Bate: not Alice.)

And if Charlie understands what his jumps does, neither does Charlie.

Then what time do you think Charlie would say is on Alice's clock, if it is not 10 or 70? Is it is 40 or what?