"'Experimental facts' are *only* valid for the time period covered by the experiments. "
Not when it comes to Evos they are not.
They take an inference and call it evidence.
Yes and the evos will always ignore the point when it is scored and merely move to some other, equally invalid claim such that it is merely one long, never-ending argument and you have to prove them wrong at each and every point or they will claim victory.
Never mind that you have repeated shown them to be liars.
That's just how the game is played.
I mostly engage in it so that like-minded people can benefit from my sources and experience to strengthen their witness. There's no 'proof' around this, only assumptions and inferences. There is nothing technically inferior about the YEC position. It all rests on belief, on both sides.
Once you realize that, you don't have to fear the ridicule of these people any more. That is really their only weapon and we know about 'weapons'.