NO, Conceptually it CANNOT be done. That is my point. Your only actual answer to my challenge on this point is three words buried in the middle of your post.

UNIVERSALLY CONVINCING REVELATION.

and they are as far as I can tell either false, or completely meaningless. Literally what you are saying is that if everyone believes that God exists, then he exists. That's obviously false, so you must mean something else. I don't know what you mean by that, I don't think you do either. Sorry to be so strident about this, but I have wrestled with this problem for years, and all the answers I have seen have been as incoherent as this one. Perhaps if you read my article linked above, you would understand why I am quite certain this can’t be done.