A material correction (a factual error that changes the meaning or could mislead a reader) is logged with a visible correction notice at the top of the affected page, dated, and the original text is preserved in a footnote rather than silently overwritten. A minor correction (typographical, broken link, formatting) is made silently. We publish a running
corrections log as part of our editorial policy. This is a professional norm carried over from news publishing; we apply it because in a YMYL field the cost of a quietly corrected error is higher than the awkwardness of flagging it.