OK, so your position is that to show private citizen Trump could not legally possess documents marked classified, the government must prove the negative, that Trump never declassified them IN HIS MIND while POTUS? The SM and the 11th circuit didn't buy that, but If that's your position, then all I can say is I wish Trump the best of luck should he try that, in court. Who he'll have to convince is the DoJ first, then if they indict, possibly the judge who would have to allow that "evidence" then the jury. I'd pay to see it.
But the idea that POTUS has this kind of power, to think something, therefore it's done, is about the dumbest notion I've ever heard. Yes, he CAN declassify anything, and there's no procedure he must follow, but he has to have some EVIDENCE of it happening if he wants to show, 20 months after he left office, that he did this act.
Again, it's not just "government property" but sensitive national security information that is the issue, NDI, secrets that he had no right to possess and store like he did old news clippings, secrets that if disclosed definitely warrant indictment and conviction of the Espionage Act. It's not just about the PRA, but much more.
And to me it's a dangerous road when we assign these almost magical, supernatural powers to POTUS, that mere "thought" is to do something, and he can 20 months later just declare he thought about something and we are supposed to treat that assertion with more than LMMFAO responses.