Jim, I feel you are purposely leaving out the premise of what the argument was based on. Let me copy and paste it for you...
I've been in this situation before. Sometimes I have even seen and read the art, but for some reason can't find it again.
Therefor, the examiner cannot find the art, but knows it is out there. Trust me on this, it is a conversation I have had numerous times with examiners. I've had examiners give me the paragraph number of a case they have read, but can't find again for the needed limitation. The scenario is even more prevalent for NPLs.
I'm fully aware of the context. Your rejection is based on your memory, and your memory alone (yeah, there's the "good ol' 103" rejection, but the missing 102 reference appears to be the real reason for rejection throughout this discussion). And, your memory is infallible, unlike everyone else's memory. Have you ever cited a 102 reference that the applicant was able to overcome by argument or amendment?
I think you're overlooking the fact that, with the all-important 102 reference in hand, the applicant can amend or abandon (or -- heaven forbid -- persuasively point out why the 102 reference isn't applicable). But, as it stands, the examiner will find no argument/amendment persuasive as long as the primary reference remains hidden from the applicant and can't be directly addressed.
Consider the counter-situation. Let's say that the entire rejection is based on one killer 102 reference. I have proof that the reference is not a valid reference. Perhaps the publication date is mis-printed on it and it wasn't published until years later. Or perhaps it reports research that was fraudulent (completely faked). Just imagine the reference is not a valid reference and I have proof. Except that I don't. I know I've seen it. I know what it says. I just can't find it.
So, I file a sworn statement that I've seen this proof, I remember it's content, but I can't find it. And, just for the sake of argument, assume I'm right.
Do you remove the 102 reference? If patents really are sacred, they should be allowed when allowable. This hypothetical application
is allowable.
How do I explain to my client that the case remains rejected in view of a reference that can't be found and that, until the reference is found, it will not be allowed and that, until then, we'll be faced with rejection after rejection and nothing we say will be persuasive?
If you can't reject properly, don't reject improperly. In this situation (of the lost reference), I would much rather that prosecution was delayed until the reference is found -- it's less delay than prosecution centered on red herring art.
And, like what most people do when they can't find something, after a reasonable amount of time, the examiner should proceed as if the missing art doesn't exist. It's the right thing to do. Anything else is Gitmo for patent applications.
Regards.