when my scenario proves it's inherently untrustworthy.
No it doesnt. Your scenario merely tosses determinism out the window. Of course, you have no good reason or evidence to do so, nor could the concept of "evidence" even exist in the scenario you just dreamt up. so all your scenario and comments show is that you have a weak grasp of logic and an inherent tendency to believe utter nonsense.
Let me sum up your stupid diatribe:
"Nothing can be trusted, because magic might be real!"
Wow, you're a real deep thinker, haha