@matana JKR is the very definition of "death of the author" with all of the random dumb shit she has added and changed about HP over the years. If it wasn't canon before it would be now anyway and she can always be as revisionist as she wants about anything.
@matana
Harry: And why aren't there almost any black students?
Dumbledore: Yeah, that... Well, there used to be many more diverse students at Hogwarts, but Merlin solved that issue.
I'm the joke, but you're the punchline.
I run this website. I like posting funnies and fugging lolis.