How Descrybe verifies legal citations
Legal citation verification is not just asking whether a citation exists. A serious check asks whether the citation resolves to the right authority, whether the quoted language appears in the source, whether the case supports the point, and whether later treatment changes how much weight the authority should carry.
What citation verification really means
A citation can look convincing and still fail in several different ways. It may point to a real case but the wrong case. It may cite a real opinion but quote language that is not there. It may quote language correctly but use it for a proposition the case does not support. It may rely on an authority that later courts limited, distinguished, or rejected.
That is why citation verification has to be more than a binary check. The useful question is not only "does this citation exist?" The useful question is "what does this source actually say, and can I safely rely on it for this point?"
Where AI legal research can drift
General AI systems are very good at producing fluent legal-sounding text. Fluency is useful, but it is not the same as authority. A model can mix up captions, invent reporter citations, overstate a holding, or attach a correct citation to a sentence the case does not support.
Even when the citation is real, the legal work is not done. A researcher still needs to inspect the source, confirm the quoted language, understand the posture, and check whether later authority changes the risk of relying on it.
How Descrybe approaches the check
Descrybe is built around primary-law grounding. The goal is to keep every answer connected to sources a user can inspect. Different Descrybe tools do different pieces of the verification workflow, but they share the same basic discipline: resolve the authority, inspect the source, and make the support visible.
- Citation lookup resolves a case citation to the matching authority in Descrybe's primary-law corpus.
- Case details provide the caption, court, date, opinion inventory, and other context that helps confirm the source is the right one.
- Quote verification checks whether quoted language appears in the source and points the user back to the matching passage when available.
- Focused passages help surface the source language most relevant to the legal question or proposition being checked.
- Cytator treatment signals help users inspect how later cases appear to treat an authority, including treatment tied to legal issues where available.
- Descrybe Review applies these checks across a brief or legal document so citations, quotes, and support can be reviewed in context.
Existence is only the first layer
Finding a real citation is important, but it is not enough. A real case can be cited for the wrong point. A sentence can be copied accurately but stripped of the limiting language around it. A case can be good law for one issue and weak or dangerous for another.
Descrybe is designed to make those layers easier to inspect. It does not ask users to trust a bare answer. It shows the authority, the source language, and the surrounding signals so the researcher can decide what the authority actually supports.
What to check before relying on a citation
A practical citation check usually has several steps. Descrybe can help with many of them, but the final judgment still belongs to the researcher.
- Confirm the citation resolves to the intended case, court, and date.
- Open the source and inspect the relevant passage.
- Check whether any quoted language appears exactly or whether it has been paraphrased.
- Read enough surrounding context to understand the holding, posture, and limits.
- Look for later treatment before relying on the case.
- Ask whether the case supports the precise proposition being made, not merely a related topic.
How this shows up across Descrybe
In the Descrybe Platform, citation verification appears in direct research tools, DescrybeLM answers, and Descrybe Review. In Claude, Descrybe Legal Engine gives Claude access to focused tools for citation lookup, source retrieval, quote verification, case analysis, and treatment checks.
The shared idea is source control. Whether the work starts in the platform or inside Claude, Descrybe is there to bring the legal source back into view.