Therefore, its known narrative elements are not a part of the Doctor Who universe as we, on this Wiki, choose to define it. It may have been the basis for a similar story in another medium, however — and that story may indeed be valid.
The Why Knot was a planned Eighth Doctor Adventures novel by Jonathan Blum, pitched in late 1999 or early 2000. It would have featured Daniel Joyce, albeit under another pseudonym, and revealed more about his place in the series plotline. It also would have featured Saldaamir. However, after several synopsis-drafts, range editor Justin Richards rejected the story.
In 2009, Blum suggested that he was thinking of writing The Why Knot as an original novel.