DENCH-and-PALMER wrote: Authorial intent is that it's set within DWU but is it a valid source?
Note: Valid source is a story like The Three Doctors or Survival.
And invalid source is a story like The Curse of Fatal Death and Dimensions in Time.
Both of those stories are excluded because they're parodies; we have subzero reason to believe that Faction Paradox falls in that category. Since authorial intent is the last of the four little rules to be resolved, this would mean it's a valid source. Besides, Faction Paradox is already an invalid source. This thread is about why Faction Paradox should be considered valid, and any other discussion is off-topic.