Generative research tools will give you a sentence and a citation. The citation may be real. It may be a real case used for the wrong proposition. It may be a string that looks like a reporter cite and names no decision. The lawyer who signs the brief owns all three outcomes.

Verify a citation free on /verify. Paste the cite or paste the paragraph. OWL runs five checks: existence, citation format, holding support, verification path, and a human review flag. The first check does not require an account or a card.

Verification that cannot say “citation not found,” “ambiguous citation,” or “source unavailable” will hide those states. OWL shows them. Carpenter v. United States, 585 U.S. 946 (2018) is the one-click public example so you can see a passing path, including the required human-review flag, without inventing an accuracy percentage.

For a full brief, use per-document or firm verification on /pricing. OWL is a verification layer, not an AI lawyer, not a paralegal replacement, and not a Westlaw competitor.