Board Thread:Inclusion debates/@comment-28349479-20161216221639/@comment-27280472-20161221155035

DENCH-and-PALMER wrote: Well that certainly proves identity... I never doubted it but rules be rules.

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. DWU and valid source are the same thing. Until comparatively recently, the prefix was "NOTDWU" rather than "NOTVALID." NOTVALID is for things that are deemed related enough to Doctor Who that they need pages, but not set in the "DWU."