Not available online doesn't mean the paper's existence is made up.
True, but note that the post you're referring to does say:
I've emailed dozens of academics, libraries, and archives - none of them have a copy.
So this isn't somebody just saying "I couldn't find it with Google, therefore it doesn't exist."
From the available information, this looks like a technical report by a, probably now defunct, company back in the 80s.
Yeah, I think that's the key point. An internal technical memo from a private company, from that far back, isn't likely to be easy to find. It's quite possible that it's never been digitized and put on the 'net, and it it wasn't published in a journal, it may never have been archived by any university libraries or such-like.
That said, I'd be a little surprised if a copy didn't turn up somewhere, even if it means a former employee of CCA finding a copy in a desk drawer and providing it. But who knows?
True, but note that the post you're referring to does say:
I've emailed dozens of academics, libraries, and archives - none of them have a copy.
So this isn't somebody just saying "I couldn't find it with Google, therefore it doesn't exist."
From the available information, this looks like a technical report by a, probably now defunct, company back in the 80s.
Yeah, I think that's the key point. An internal technical memo from a private company, from that far back, isn't likely to be easy to find. It's quite possible that it's never been digitized and put on the 'net, and it it wasn't published in a journal, it may never have been archived by any university libraries or such-like.
That said, I'd be a little surprised if a copy didn't turn up somewhere, even if it means a former employee of CCA finding a copy in a desk drawer and providing it. But who knows?