One run of one kind of research on one subject: the unit of work, priced in credits, that produces a research page.
The product’s working definition.
The unit of work. Every catalog page describes one kind of scan; running one produces one research page whose claims carry their grades and whose sources are listed. In the product the artifact is a scan; on these public pages it is called research.
The handful of nouns the pages use for the things the product makes and keeps.
Every grade here is assigned by the same rules on every scan, and the methodology page renders those rules from the code that enforces them.