Methods

Sources

Follow a claim back to the document. Each method profile states how its sources were inspected and where their coverage stops.

How to read the evidence

Official rules are identified by jurisdiction. Teaching chapters explain a method; original papers support a particular study. Abstract-only access supports only information visible in that abstract. Constructed teaching scenarios are never presented as published findings.

Sources were checked October 21, 2026. This is an access date, not the source’s publication year. Where one document serves several profiles, the catalog below gives one inspection note; consult the profile for its local context.

Source catalog

42 distinct source URLs across 28 profiles.