I would counter that there's a reason
Word of God is included (and became a term in the first place) on TVTropes--people put a great deal of weight (as the term implies) on official "decrees," and the examples on that site show that it often has nothing to do with tie-ins.
Yes, but what I'm saying is that there's a belief that the
word "canon" itself is some kind of magical label that needs to be officially appended to something before it "counts." Like the quoted comment just above that the TV series itself only counted as canon because some imaginary official at the studio had "decreed" it canon, as if there were some kind of formal certificate that had to be issued. No. That's rubbish. It's not an official seal of approval issued by the studio, it's a term of analysis that fans and critics use to describe something -- and that the studio or producers may occasionally bring up when addressing fans' and critics' questions on the issue. The show is the canon because it's not a derivative work, just as a continent is the land because it isn't the ocean. Calling it that doesn't
make it that, it just describes something that already exists.
Star Trek is different from these other examples (for me), but is clearly close enough to the Star Wars end of that spectrum for some people that they're going to make certain choices based on a decree from on high about how much some stories "count."
Even so, nobody has to say that the core series itself "counts," because it's the baseline. It's automatically the canon, by definition. The debates only arise with secondary or derivative materials.
Actually, here's a more direct way of addressing this question when it comes to tie-ins:
If something in a TrekLit work were to go blatantly against something established specifically in TAS (I can't imagine what that would be, but feel free to envision your own example), would it have to be revised to the same extent as if that happened with respect to one of the live-action series?
Actually that did happen just recently: The TNG novel
The Light Fantastic followed up on Harry Mudd in a way that overlooked the events of "Mudd's Passion." It wasn't entirely irreconcilable, but it certainly implied that "Mudd's Passion" hadn't happened, and evidently the licensing folks didn't have a problem with that.
On the other hand, the licensing folks had no problems with me explicitly referencing multiple animated episodes and characters in my own novels, or with Dayton Ward and Kevin Dilmore doing a direct sequel to "The Time Trap" in the
SCE series, or with Peter David making Arex and M'Ress regular characters in
New Frontier, or with D.C. Fontana using Arex in her
The Enterprise Experiment comics for IDW. I think that referencing TAS is more common these days than overlooking it.
I suppose it's possible that TAS is treated as sort of "optional canon" -- nobody's going to say you can't count it, but nobody will get too up in arms if you overlook it. Still, I think it's the former that matters. People shouldn't be scared off of watching it or counting it because of some sort of official declaration, because there is no ban against it. At worst, it's just a sidebar.
Let me see if I can make a no doubt incomplete list of TAS references in the novels:
- "Beyond the Farthest Star": Aliens referenced in The Buried Age.
- "Yesteryear": Extensively referenced in canon and tie-ins. Of all TAS episodes, this is the one that most unambiguously did "happen."
- "More Tribbles, More Troubles": Followed up in flashback chapters of Excelsior: Forged in Fire. Robot ship design used as Antares in TOS Remastered's "Charlie X."
- "The Survivor": Only onscreen reference to McCoy's daughter, who's appeared in various novels and comics. Carter Winston featured in Myriad Universes: A Less Perfect Union, and in the '80s continuity's The Final Reflection. Vendorians mentioned in Terok Nor: Night of the Wolves and ENT: Rosetta. Rator III and Vendor mentioned in Star Trek Online. Engineer Gabler featured in Department of Temporal Investigations: Forgotten History.
- "The Infinite Vulcan": Phylosians referenced in several books and STO; Keniclius referenced in at least one Strange New Worlds story.
- "Mudd's Passion": Rigelian hypnoids mentioned in Rise of the Federation: Tower of Babel.
- "The Time Trap": Klothos mentioned canonically in DS9: "Once More Unto the Breach." Sequelized in SCE: Where Time Stands Still. Devna is a featured character in Rise of the Federation. Cygnians (such as Magen) mentioned in multiple books including Forgotten History and Titan: Synthesis. Various interpretations of the Bonaventure mentioned in books and fan art.
- "The Ambergris Element": I think I referenced it in Forgotten History.
- "The Eye of the Beholder": Lactran zoo referenced in DTI: The Collectors.
- "The Jihad": Vedala referenced in Forgotten History. Em-3-Green's species featured (as Nasat) in SCE and elsewhere. Sord's species featured (as Gnalish) in Stargazer series and elsewhere. Skorr referenced in various novels. Indurite referenced in Over a Torrent Sea and elsewhere.
- "The Pirates of Orion": Choriocytosis mentioned in early novel The Covenant of the Crown (by episode author Howard Weinstein). Events referenced in Ex Machina.
- "Albatross": Events referenced in Ex Machina. Dramia mentioned in Andor: Paradigm.
- "How Sharper Than a Serpent's Tooth:" Ensign Walking Bear referenced in Crucible: The Fire and the Rose (indeed, I think Crucible makes at least a passing reference to every TAS episode).
- "The Counter-Clock Incident": Robert and Sarah April featured in multiple novels and stories.
So the majority of TAS episodes have been referenced more than once in various tie-ins, with a few, such as "Yesteryear," "The Survivor," "The Time Trap," and "The Jihad," having extensive influence. I'm sure
Therin of Andor could add even more references. True, there are a few episodes that most writers are content to avoid referencing, like "The Magicks of Megas-tu" or anything about "Counter-Clock" besides the Aprils; but you can say the same about various live-action episodes. (Aside from one SNW story, nobody's ever tried to follow up "The Alternative Factor.")