I think anyone who has read this thread, or previous discussions, on the topic of Victoria's heritage can see that the matter is not "beyond debate." As Midnite suggests, a final answer was not explicitly given on the show. Therefore, since intelligent and observant people disagree in their interpretations, it obviously remains debatable. All of us who have posted here have picked up on different and contradictory evidence, some of it from outside the actual show's content, such as comments made by actors, producers, the story bible, etc. Some of the evidence cited here could be called theory, fancy, or even hearsay.
What I think remains undisputed is that the mystery of Vicky's parentage was in a state of flux and ideas about it changed. The story bible suggested one possibility; some of the writing seemed to suggest another possibility or possibilities; and outside testimony states that such-and-such a decision was made at such-and-such a point in time. Finally, 30 years later, Dan Curtis gave the explicit directive to Stephen Mark Rainey and Elizabeth Massey that Elizabeth should be Vicki's mother in their DCP-sanctioned novel. (This was discussed with Mark Rainey the last time the topic was discussed, too, in the thread that became corrupted.)
I'll just offer one final bit of speculation. In my opinion, writer Francis Swann may have been working on a different assumption than the one most fans of the show have settled upon, and perhaps Swann's concept was along the lines of one of the versions developed by Bob, CassandraBlair, and myself. This is even more speculative, but perhaps Swann was not going in the direction that the producers decided on, and that could have had something to do with why he left the show just when the mystery was heating up.
Grayson67 wrote:
Although we'd all probably like definitive answers to our never-ending questions, in a way I'm rather glad that so many questions regarding plots and characters have remained unanswered... it gives us so much to speculate on and imagine for ourselves.
I'd like to frame this and hang it in a DS shrine in a corner of my room