In our minds there's a Picture of the OTU by which we rate publications. It's how we decide how likely a new publication is potentially "canonical".
I think that Picture, however imperfect in our heads, is a picture of Canon. (Invoke Plato's parable of The Cave if you like).
Thoughts?
EXAMPLE 1. GURPS: Sword Worlds builds exactly on canonical data about the Swordies. It doesn't change who they are in its expansions: it feels right, nicely consistent, carefully built to preserve the OTU while also improving on it. The conclusion is that it's obviously clearly canon.
Why was it so easy to decide that? There's new material there. Well... It's how the book treated the extant OTU material, and how it seems to grow organically and carefully from it. It meshes, seamlessly. It reflects deep knowledge of the OTU. It's like Hans really wanted to keep true to the material -- which is of course the case.
I think that Picture, however imperfect in our heads, is a picture of Canon. (Invoke Plato's parable of The Cave if you like).
Thoughts?
EXAMPLE 1. GURPS: Sword Worlds builds exactly on canonical data about the Swordies. It doesn't change who they are in its expansions: it feels right, nicely consistent, carefully built to preserve the OTU while also improving on it. The conclusion is that it's obviously clearly canon.
Why was it so easy to decide that? There's new material there. Well... It's how the book treated the extant OTU material, and how it seems to grow organically and carefully from it. It meshes, seamlessly. It reflects deep knowledge of the OTU. It's like Hans really wanted to keep true to the material -- which is of course the case.