My argument is not about “gaps in understanding”; it is about causal attribution.
Inspiration - including divine inspiration - does not cause understanding.
Understanding refers to a response - even when there is not one. If there is no response, there is no understanding about that to which there might otherwise have been a response.
Paul's claim that he was divinely inspired is not a claim that his understanding was divinely produced. Paul's understanding was "caused" by Paul. Paul is responsible for his understanding because his understanding is his response produced by him.
When a text’s language, genre, argumentation, and transmission are fully accounted for by ordinary human processes, there is no remaining explanatory work for a non-human cause to do.
So what? We're right back at - or still stuck on - the point that human understanding is human-caused.
Paul’s “not of human origin” is a positive causal claim.
Nope. His understanding is his response to an experience. The fact that you remain always focused on that to which Paul was responding fully explains without gaps why you never bother to begin trying to understand Paul's understanding expressed in his preaching of the alleged good news. Do you have experience-envy? Is that it? You need to have that experience in order to begin to understand how Paul's understanding is a response to inspiration? More on that possibility below.
If the observable artifacts require no extra cause, the rational conclusion is that the extra cause is unwarranted, regardless of anyone’s inner “understanding.”
No. The rational conclusion is that the actuality of the inspiration and the actuality of the divine in "divinely inspired" are not indubitable. And a rational response to that is to seek to develop an understanding about the understanding at issue, including the development of that understanding as well as even subsequent developments.
Then by your own standard, Paul’s use of origin language is deficient when deployed to demand deference.
Given my previous remarks acknowledging how it can be appropriate to make use of inherently deficient appeals to authority in an attempt to effect or demand deference, I am going to change slightly the context/perspective of the above cited statement for the purpose of further explication.
Personally, my immediate intellectual and emotional inner-self response would be one disfavoring such a use by Paul of an inherently deficient appeal. But, there is some solace to be had in the fact that, while an appeal to authority can impede the development of understanding, an appeal to authority is not necessarily sufficient to preclude the development of understanding.
Now, if Paul and I were having a private discussion, any appeal to authority on his part would be shot down not only for being inherently deficient but especially for being situationally inappropriate. If that appeal to authority were to come at the beginning of a discussion - that would be one thing. If that appeal to authority came well into a discussion, that appeal could indicate a limit reached in the development of Paul's understanding about my understanding - whether because of Paul's own limitations at the time or because of limits to my own contemporaneous expressive capabilities despite the fact that I regard the constant re-casting of expressions as being of very great importance. Of course, that re-casting is itself dependent on the ability to imagine still additional possibilities, and sometimes realizing those possibilities does not occur until after a discussion has ended.
Paul’s origin claim is not a neutral citation to stimulate thought.
But Paul's "origin claim" is not the same as the understanding which he preaches as the allegedly good news. Returning now to the make-believe-I'm-having-a-discussion-with-Paul mode.
Given Paul's report of having been divinely inspired, there is this truth: either Paul's thinking/understanding was divinely inspired or it was not divinely inspired. Given that Paul was trying to express an understanding, one topic of discussion could be about why it is that he so often refers to his inspiration experience since the understanding he is expressing/preaching is a matter of his own thinking which he knows is - and which he has to acknowledge as - his own and not God's.
Paul could be asked whether it is the expression of his understanding which he expects will stimulate thought, and he would respond that he certainly hopes so. And then he could be asked whether these repeated references to his having been inspired is reasonably expected to likewise stimulate thought. And Paul could say that no, the story of his inspiration is not expected to be thought-stimulating in the same way, even if that story stimulates any thinking at all. After all, all stories stimulate some thinking. He could continue explaining that one reason that he keeps referring to his inspiration experience is just in case any others think they have had a basically similar inspiration experience in which case they need to understand that it is not the experience itself which is important. What is important is the understanding which they develop that is important.
In fact, what I, Paul, hope gets understood is that any such experience without furthered understanding is an experience of no importance. It is the development of understanding which is important, and it is such development which makes the experience have any importance at all. But, even then, the understanding is not enough. Not only does the understanding need still further development, but the understanding is also not important except insofar as the understanding effects acts; understanding is ultimately for the sake of acts done for the sake of others.
A person can develop understanding without having had an inspiration experience by undertaking to understand the understanding reported by others - whether those others were inspired or not. You know, now that I, Paul, think about it, it could be that some understanding about the understanding had by an other person could come about with some sense of inspiration which seems to have all of a sudden brought understanding as if from nowhere and which seems more like an opening up to that which was already there but which was not yet noticed. Even then, understanding only follows from some sort of opening up with that opening up not occurring without the effort to understand having first been undertaken. And that opening up only occurs in terms of an opening up to - a realization of there being - alternative ways of having considered what was being considered.
Hmmm. Maybe I, Paul, should have tried developing a better explication of all this. But, it's not like I totally ignored this whole matter. Because, for instance, I did explain a little bit about the nature of love, and this stuff about understanding is ultimately about acting with love for the sake of others.
End of that issue discussion with Paul.
has ordinary human explanations.
And as I keep repeating: Human understanding always has human explanation, because it is humans doing the understanding. Even from a religious perspective, understanding humans in terms of what they do and how they can understand is not expected to - and is not going to - demonstrate the actuality of a divine realm.
Paul’s revelation language cannot bind anyone outside a prior commitment to it.
"Bind" has nothing to do with it. One seeks to develop manners of expression in the hope of effecting furthered development of - as well as providing improved communication of - understanding. (Of course, one could seek to develop manners of expression for exactly the opposite purpose, but that is ignored here.) Even were someone to want language to bind, that is not how language works; that is not how language works in regards to understanding or when the development of understanding is the interest. Recall this previous Levinas citation: “It might also be asked whether the old … text, which employs a vocabulary from a very early spiritual climate, is capable of expressing what we mean … 'today.'" As well as this about language: "a medium marvelously well-suited to permanent interrogation". Those two remarks go hand in hand.
Speculation about motives is not a substitute for evidence. ... distinguishes hypothesis from proof ... evidence is the finish line.
You are correct to distinguish hypothesis from proof, but, the rest seems wrong. If, as seems to be the case, it is proof which is that alleged "finish line", the goal, then it is a great error to restrict evidence to proof attained. Such a restriction would mean that evidence could only be evidence
ex post facto, and that would mean that there is never evidence before there is proof. That, of course, is an absurdity.
Alternatively, if "the finish line" does not refer to proof attained, then "evidence" could refer to an aggregate of all possible factors germane to consideration, but that way of using "evidence" does not disqualify speculation as germane to consideration.
I expect that you realize this about evidence and the nature of evidence.
Whether you yet realize it or not, this also means that your claim of evidence lacking seems to be only a claim of proof lacking, and the lack of proof has not been contested. Indeed, in this discussion, it has always been taken as granted.
Now, with regards to proof of understanding the understanding of persons, let us just say/stipulate that there never is any such proof (rare as it would be) - if only because understanding is always subjective. This allows for a more precisely correct rendering of your "Speculation about motives is not a substitute for evidence" when restated as "Speculation about motives is not a substitute for evidence, because that speculation is (part of) evidence despite proof not having yet been attained or even if proof is impossible."
Speculation is easily rendered as truth: It is possible that what is being speculated is actually the case, and it is possible that what is being speculated is not actually the case. And both possibilities are then pursued. Or not. It all depends on one's own inclination. And that is what determines the development of understanding - including the development of understanding about the understanding had by an other person.