[WolfeReader]

If you say "publishers require DRM" and then say that publishers sometimes sell books without DRM, you might need to review the definition of the word "require".

Some publishers require DRM. Which is entirely different than the false claim made earlier that "selling ebooks necessarily requires DRM".

[themadturk]

When DRM is used, it is because publishers have required it, not because booksellers require it. Is that a better way of putting it?

[WolfeReader]

It's a completely different statement, so yes.