P was to EJ, H and D, what D was to EJ and H, what H was to EJ, and what J was to E: a response to a challenge.
But what P, with H, wanted to do to EJ and D, is similar to what D wanted to do to H, and to what J wanted to do to E: replace the challenger.
And then there are the versions. Every source came in numerous versions; versions responding to changes in the Metziut; versions responding to specific versions of challengers.
Now what did the redactor do? He combined a scroll of EJ, a scroll of HP, and a scroll of D, three sources in his view, into one document, one scroll. He did this very brilliantly, knowing there were prophetic secrets in each of the three sources, the details of which he was not privy of. So he combined to preserve, keeping the three sources intact to a very high degree. He arrived at the Torah, which is a book of contradictions, as it is a book of secrets, of HaShem.
