The only things we can prove, or establish, are those "elements" that exist in the narration. These are not the same things as "details offered by author" but rather these are the existing elements in the construction of his narration because these are elements that we actually "know exist", the original narration itself providing us with this "provenance." All else offered by the author still remains to this very day as unverified detail with no provenance whatsoever. The elements/construction of the narration reveal quite a bit, just as they always do. The details offered by the author, to this very day, still reveal nothing.