Crime statistics are rendered useless if violent and sexual attacks committed by men are recorded as female crimes. Activists are already clamouring … - J.K. Rowling

'Cis' is ideological language, signifying belief in the unfalsifiable concept of gender identity. You have a perfect right to believe in unprovable essences that may or may not match the sexed body, but the rest of us have a right to disagree, and to refuse to adopt your jargon.

I'm going to keep going until I succeed — or die. Don't think I don't know how this might end. I've known it for years.

If you need to tell your readers something … there are only two characters that you can put it convincingly into their dialogue. One is Hermione, the other is Dumbledore. In both cases you accept, it's plausible that they have, well Dumbledore knows pretty much everything anyway, but that Hermione has read it somewhere. So, she's handy.