No, you didn't answer. You repeated your nonsensical claim that the president doesn't have to give any indication whatsoever that they declassified a document. That doesn't actually answer either of these questions...
If a president dies without ever telling anyone he declassified a document, how does anyone ever know it was declassified? If someone were to try to gain access to such a document through the FOIA, how could that be granted?
I'm not asking you does a president have to give any indication to anyone that they declassified a document.
What I am asking you is IF they do that and then die without ever giving any indication they declassified such a document, how does anyone know it was declassified? And since the public has a right to gain access to non-classified material via the FOIA, since such a document would still appear classified, how can the public get access to a declassified document which bears no indication whatsoever that it was declassified?
Here's another question you won't answer... According to you, Reagan might have declassified every document within his reach. But he didn't tell anyone and didn't mark any as unclassified. So again, according to you, the public should be able to access any and every document he ever looked at even though they're still marked up as classified. Why can't we see them?