Tony:
No. Why would thinking that be ridiculous? Especially since my answer is correct.
Okay. Time to close the thread, then? Are you done?
So they are together, at zero velocity, on Earth, at the start. Therefore, to get to different speeds, they must both accelerate to the required speeds. Right?
I asked "were they together at rest"? That means: did they both share the same (zero) velocity, initially? That's what "at rest" means, in physics.
Maybe a language issue.
No. You misunderstood me. See above.
Okay. They both accelerated. That means we can't just use SR, which only usually works for constant relative speeds. Once you introduce accelerations, we'll need either GR or some complicated integration.
Okay, so the person passing the other person does not slow down and join the other person. He just flits past at very high speed and the two of them don't meet up again?
If you're travelling at 100 km/hr and I'm travelling at zero km/hr, then if you want to meet with me, you're going to have to slow down from 100 to zero. That means you have a non-zero acceleration while your speed is changing. Agree?
No. I asked you to give a complete specification of your scenario. You
still haven't done that.
Please do it. Then we can talk about it. You must specify
exactly what the motions are of person A and person B. Where do they start from? How many times do they accelerate? For how long do they travel at constant speeds? Where do they end up?
Yes, I can. In this case, you posted two separate threads. One had a useless title, like "Can James R answer this?", which also defeats the purpose of having a public thread. (If you want to direct a question specifically to me, why not use private messaging?)
Your other thread title was something about Chat GPT and the Emperor's New Clothes, but then it had this transcript of your chat with GPT about relativity.
I made a decision as a moderator to merge your two threads, on the same topic, into a single thread. I gave it a title that more accurately describes the content of the thread.
Yes, Tony. I'm actually 800 years old.
Yes, Tony. I did exactly that. Good guess.
Now, once you've finished trying to be cute, are you going to post your scenario with all the necessary details, and your questions about it, or are we done?