What happens if a referenced source is retracted or updated?

CueCrux performs nightly retraction syncs (e.g., Crossref, Retraction Watch). Retracted sources remain visible but receive severe trust penalties and clear banners in the UI. Updated content automatically triggers hash mismatches, alerting users that evidence has changed. Answers referencing retracted evidence link to updated receipts, ensuring no stale or invalid evidence misleads users.