The policy
A material error is one that would change a reader's understanding: a wrong fact, a misattributed or missing source, a claim stated more strongly than its evidence supports, or a definition that misrepresents how a term is used. Material errors are corrected in public and kept on this page. The original wording stays visible, because a correction that erases what was said is not a correction.
Typos, broken links, and formatting fixes are not corrections and are not logged. Changes to a definition's meaning are handled through definition versioning as well as here.
To report an error, write to [email protected] or use the contact page. Including the page URL, the sentence, and the source you are relying on gets it resolved fastest.
The record below is also published as a machine-readable log at /corrections/corrections.json.