how good are the receipts 0 need a look
Provenance is mandatory here; its SHAPE is not. Every claim carries the grade that answers one question — can I check this? — and there are three honest answers: a URL you can open, a document you have to go and look up, or nothing stated at all. A dead link degrades a claim from resolvable to cited; it never invalidates it, and a claim that names nothing is labelled rather than dressed up as one that does.