What’s cannon?
A big metal tube that fires projectiles, but that’s not important right now.
Okay, smartass, what’s canon?
Only things printed in actual published books or e-books are strictly considered canon. Any fiction or worldbuilding articles posted to the blog that haven’t been published in said books are probably canon, but I and my lovely editor reserve the right to change things before printing that we need to.
Anything else, including but not limited to tropes, answers to questions, comments, replies to comments, e-mails, things the author said here or elsewhere other than in a FAQ, or psychic messages from the Adepts of North Polar Jupiter is deuterocanonical at best and subject to the author having a better idea at any time.