. . . if they happen in distinct location, yes. But this proof applies to a mathematical model, albeit one that describes reality near light speed very well.
You've either never seen Einstein's "proofs" or you're just making stuff up.
The simpler of the two to explain is his "proof" parallel lines cannot exist. I note that you snipped out the part where I mentioned it, so I suspect you have one or two clues at your disposal.
The sentence "you can't prove a negative" applies to empirical evidence. For example, while you can prove the positive empirical statement such as "white swans" (just find one an present it in court), you can usually not prove that there are no naturally-green swans. Indeed, how would you prove that? Just because you tried hard to find one and failed, that still doesn't mean they don't exist.
Really? I can prove there are no zebras grazing in my back yard. I can prove there is no me on Mars. I can prove there is no Jupiter-sized planet presently located between the Earth and the Sun. Lots of negatives can be proven observationally.
There are some negatives which are problematic, perhaps impossible to prove, but "You can't prove a negative" is simply a lie. I doubt there's a single soul presently participating who doesn't cherish it.
Ironically, Einstein's "proof" against parallel lines is a total fraud. It runs like this:
Supposing you and I start side by side and walk north. At first our paths will be parallel, but eventually we'll meet at the North Pole.
I kid you not - this garbage, this total farce is repeated as a matter of standard procedure in every high school and introductory college course on physics. It's a standardized part of the curriculum at the beginning of the portion of teaching devoted to Einstein. It is deemed desirable to disorient the students first, and make them doubt things they know to be true.
Review it and see if you can debunk it. It's not all that tricky if you try.
This lie is taught in physics class, and right down the hall students could as a geometry teacher who'd PROVE PARALLEL LINES MUST EXIST.
Now for those who decline to take the challenge, here's the remedy:
Instead of walking north, turn 90 degrees and walk east or west. Meridians and Parallels are NOT the same thing, and this has long, long, long been known.
Of course it's quite important to the indoctrination procedure that students be disoriented. Anyone thinking straight, and evaluating what follows is, if they understand more than a couple of sentences, almost certain to spot flaw after flaw after flaw.
*Students. NEVER EVER question Einstein. Most of those assigned to teach it have no clue, and they will gladly assume you're "just too stupid". This isn't like creation & evolution where you might get some slack if your school isn't dominated by the hateful.