The onus isn’t on me to “know what they meant.”

Of course not. And even if you want to pretend you were actually unclear on it, it was then explained to you several times. So whether or not its on you to know it is irrelevant. You did know it, and chose to continue your argument in bad faith from there on out.

If you claim something is proof of something, be prepared to prove it when asked, or don’t say it.

So change the word “proof” in the parent comment to “strong evidence”. Is it clear to you now? Do you understand?