scope

The title asks for one share: of the citations attached to factual claims, how many point to a passage that supports that claim, as distinct from a link that resolves or a source that is merely on topic. The scope does not fix that share. It admits citation recall, link validity and topical relevance as measures, and it never chooses citation-level against claim-level or response-level, nor an attached citation against any page in the reference set, choices that move published figures by tens of points. Not Asked rightly keeps out vendor motive, user belief, legal liability and a ranking, and fabricated references as their own quantity are rightly out because existence is not support. A reader of the title expects the attached-citation rate, and the scope's wider measure list does not hold the answer to that rate.