Gah, I should have looked closer. It's a trainer & not a crack.

Actually, your refusal to accept the challenge to prove your own point, doesn't mean that you're right. So unless you're prepared to prove your assumption that emulators will always work, you have no foundation to state I am incorrect.
By the way, one example of emulation that doesn't work 100% would be PS1/2 emulation by Sony on their own consoles -- it does not work 100% hence why they publish compatibility listings. And I doubt there's a 100% working emulator for PS1/2 games on the PC either.
Yes, it's a console, but your statement of emulators always working was not specified as PC specific. So, you still haven't proven yourself correct, and I've still supplied you with examples to help show that you can't.

Please pardon my nitpicking:
I believe the exact wording was something along the lines of... (emphasis mine)
Isn't it utterly impossible to disprove that statement?

I don't think so, no. There will simply come a time when people give up or the knowledge required to achieve 100% emulation of everything is lost either in whole or in part, making eventual emulation of everything impossible.

I did give you examples, look:
NES, SMS, Collecovision, Atari ST, 2600 & 5200, Commodore 64, Amaiga, SNES (via multiple emulators) Genesis (via multiple emulators), Mac OS Classic, DOS, Windows 3.1, 95, 98.
Every single one of my 30 or so PS1 games work fine on my PSP. They also work fine on ePSXe for my PC. I'm not even talking about hardware emulation on the PS2. If it doesn't work it's because Sony didn't want to spent a bit more on them, whether it be testing time or money for components. Software emulation will eventually be perfect. It almost always gets to that point eventually.
I found Star Crusader on HotU, installed it with DosBox 0.73, configured it, played it & deleted it. It works fine & didn't have any disc protection. Since you actually own the game....
Also
http://dosbox.com/comp_list.php?showID=2210&letter=S

Well, according to Amiga emulators I have tried, neither Megalomania nor Lotus Esprit Turbo Challenge 3 work correctly if at all.
Neither Magical Drop nor Landmaker for the PS1 work correctly with emulators.
And if I could be arsed to check, I know I can find examples of Sega and SNES/NES games that aren't working correctly yet too. Now, you say PS2 emulation isn't working due to hardware, so show me a PS2 emulator that is capable of perfectly emulating some of the games that Sony couldn't get working with their own hardware....

I was considering that, but from what I have read it sounds like that might be the version without cutscenes. When I work up the willpower for another likely failure I'll probably fiddle around and try to make a super-copy that works with DOSBox. Or I'll keep holding out hope for GoG to solve my problem for me :p

It had the beginning & launch cutscenes at least.

Bad examples. The DOS versions of Megalomania & that racing game emulate fine. Magical Drop & Landmaker work fine in MAME.

Some versions of the Sega Emulators absolutely refuse to run Cadash. I found one emulator that actually ran it...if you messed with the settings, but 1 out of 5 or 6 I tried isn't a good %age.
There were others, that I can't recall the names of that refused to work on any emulator (and these were all software-based emulation). It's been a good few years since I ran those though.
Back in the 90s when the first PSX emulators arrived on the PC, nearly 50% of games wouldn't run, but again, that's been many years since I even thought of looking at that type.
MAME was actually fairly decent emulator system from what I can remember.
Never did like Nintendo consoles, so never tried any of those.
GBA emulator was fairly hit-n-miss a few years ago : but that was because they were new (I think). No idea on the current state.

Not at all. You insist that everything can be emulated, you can't then state that only certain versions must be emulated to prove your point. If everything can eventually be emulated, then that naturally has to cover every available version of a game regardless of its native system. You can't just pick and choose ignoring the versions that don't work, that just essentially proves that you're incorrect.

s/all/most/
Problem solved, right? Can we all move on now?

In a nut shell, nope.

Oh well, continue the bickering then.