Research retrieves from primary-law providers, then checks the answer against what was actually retrieved.
Court opinions through CourtListener, codified state statutes, federal legislation, and the Code of Federal Regulations. Proposed bills are labeled as proposed measures, not treated as enacted law.
Asserted citations are matched against the retrieved sources. Anything unmatched is reported rather than presented as settled.
Only the research question reaches public search providers. Uploaded documents are never sent to them.
All 50 state hierarchies, plus D.C. and federal, were checked against each judiciary's own published structure, with the source recorded.