It's canon until it's not (ie, explicitly contradicted by some other Trek installment). And even then, canon in fiction is rather a silly concept anyway, and is largely more up to the collective opinion of the fan base than whatever big corporations owns the rights to it.
Daystrom Institute
Welcome to Daystrom Institute!
Serious, in-depth discussion about Star Trek from both in-universe and real world perspectives.
Read more about how to comment at Daystrom.
Rules
1. Explain your reasoning
All threads and comments submitted to the Daystrom Institute must contain an explanation of the reasoning put forth.
2. No whinging, jokes, memes, and other shallow content.
This entire community has a “serious tag” on it. Shitposts are encouraged in Risa.
3. Be diplomatic.
Participate in a courteous, objective, and open-minded fashion. Be nice to other posters and the people who make Star Trek. Disagree respectfully and don’t gatekeep.
4. Assume good faith.
Assume good faith. Give other posters the benefit of the doubt, but report them if you genuinely believe they are trolling. Don’t whine about “politics.”
5. Tag spoilers.
Historically Daystrom has not had a spoiler policy, so you may encounter untagged spoilers here. Ultimately, avoiding online discussion until you are caught up is the only certain way to avoid spoilers.
6. Stay on-topic.
Threads must discuss Star Trek. Comments must discuss the topic raised in the original post.
Episode Guides
The /r/DaystromInstitute wiki held a number of popular Star Trek watch guides. We have rehosted them here:
- Kraetos’ guide to Star Trek (the original series)
- Algernon_Asimov’s guide to Star Trek: The Animated Series
- Algernon_Asimov’s guide to Star Trek: The Next Generation
- Algernon_Asimov’s guide to Star Trek: Deep Space Nine
- Darth_Rasputin32898’s guide to Star Trek: Deep Space Nine
- OpticalData’s guide to Star Trek: Voyager
- petrus4’s guide to Star Trek: Voyager
Canon Trek is rife with contradictions. The rest of your comment is a healthy approach to thinking about canon, though.