Here's what's fugged up about ya, RR...<quoted text>
Your entire line of questioning is flawed based off of your first assumption.
"the axiom that light's speed is constant"
That is not correct.
You said "Scientists are pretty sure black holes do exist.", which is the one and only time an atheist has been honest with me about black holes. Thank you.
On another thread, you posted this (pertaining to light's speed)...
Yes, in a vacuum it's fixed.
And underwater it's fixed.
And through paper it's fixed.
Then, on this thread, you disagree with me when I said this...
...[the axiom that] light's speed is constant (through any given medium).
We were saying the same thing... but, somehow, I'm wrong and you're right.
As I said to Largelanguage... you're more concerned with who's saying something than with what's being said. In the above case, that'd be you vs. me.