So, about a century ago. That'd be my estimate as well. And only if are on the "otherworldly genius" level as Ramanujan was.
> Dismissing this author for a lack of affiliation is probably accurate
I'm not really dismissing him just for lack of affiliations. That's just one of several "smells" that point towards the crackpotedness of the whole thing: single author, personal self-promoting website, lack of peer-review, vague non-mainstream-academia language, selling own ideas as generally scientifically accepted ones, and, yeah, lack of affiliations. To me, that's too many strikes to dismiss the whole thing outright.
> to improve the public discourse with engagement with ideas that arrive in it
I would really like to improve the public discourse here. The problem with your proposed approach is that it doesn't account for Brandolini's law. People with overinflated egos can and will generate bullshit faster than actual experts would be able to disprove it.