Legal Search
Legal Search
Corpus scope, queries, lexical BM-twenty-five, vectors, hybrid retrieval, filters, reranking, citations, provenance, relevance judgments, evaluation, failure analysis, and the retained retrieval core.
Structured Visual
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Scope and honesty note
Jurisdiction: United States computational-law classroom model; source snapshot 2026-08-28; curriculum as of 2026-08-29. Synthetic inputs, code, labels, measurements and outputs are teaching artifacts, not law, legal advice, authority, eligibility, benefits, tax, court, filing, research, ranking, or outcome determinations. Code encodes selected interpretations and can be incomplete, wrong, outdated, biased, overprecise, underinclusive, or non-isomorphic. The system must cite source and version, expose assumptions and gaps, abstain when unsupported, and hand legal judgment to accountable humans.
See the essential structure first
Start with this deliberately incomplete structure, then use the pinned authorities, worked application, exceptions, and handoff below. This deliberately incomplete preview has 4 nodes; exceptions and legal consequences remain in the sourced prose below.
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Begin with computational-law doctrine
Legal search is an evaluated retrieval task, not a truth or authority oracle. BM-twenty-five rewards lexical evidence; vector retrieval captures learned similarity; hybrid systems combine candidate sets and reranking. Scores are system-specific and not comparable without calibration. Metadata and validity filters are essential. Evaluation needs stated information needs, adjudicated relevance, corpus version, metrics and failure slices. No benchmark number is reported without a real measured run. Retrieval ranking does not establish authority, relevance to a legal issue, holding or outcome.
Graph-aware search fixture
The bounded edges support a cited-by retrieval example without implying relevance or authority. Pinned source or measurement: “[{"from": "/f-supp-2d/692/0170-01", "fromDate": "2010-03-09", "fromName": "Watkins v. Omni Life Science, Inc.", "to": "/us/559/0077-01", "type": "cites"}, {"from": "/f-supp-2d/712/0924-01", "fromDate": "2010-05-17", "fromName": "In re Arrowhead Capital Management LLC Class Litigation", "to": "/us/559/0077-01", "type": "cites"}, {"from": "/f-supp-2d/718/0805-01", "fromDate": "2010-03-10", "fromName": "Astra Oil Trading NV v. Petrobras America Inc.", "to": "/us/559/0077-01", "type": "cites"}]” Coordinate: case-citations-hertz-inbound-slice as of 2026-08-28; https://www.neochart.com/catalog/cases/us/volume_559/0077_01/index.html; data via neochart.com, snapshot 2026-08.
Filtered candidate corpus
The valid Title Twenty-Eight sample supplies real records and explicit quarantine context for scope filtering. Pinned source or measurement: “{"case_count": 1534, "cases": [{"case_path": "/us/410/0113-01", "date": "1973-01-22", "importance": 0.003491912312537867, "name": "Roe v. Wade", "sections": ["28 U.S.C. § 1253"], "url": "catalog/cases/us/volume_410/0113_01/index.html"}, {"case_path": "/us/501/0722-01", "date": "1991-06-24", "importance": 0.003330523929892698, "name": "Coleman v. Thompson", "sections": ["28 U.S.C. § 1257"], "url": "catalog/cases/us/volume_501/0722_01/index.html"}, {"case_path": "/us/501/0808-01", "date": "1991-06-27", "importance": 0.002951839720053311, "name": "Payne v. Tennessee", "sections": ["28 U.S.C. § 2281"], "url": "catalog/cases/us/volume_501/0808_01/index.html"}], "key": "usc_title_28", "label": "Judiciary and Judicial Procedure", "title": 28}” Coordinate: cases_by_law validity-filtered Title 28 sample as of 2026-08-28; https://www.neochart.com/cases-by-law/; data via neochart.com, snapshot 2026-08.
Exact statutory retrieval target
The full provision supports exact citation, phrase, subsection and semantic query examples. Pinned source or measurement: “§706. Scope of review To the extent necessary to decision and when presented, the reviewing court shall decide all relevant questions of law, interpret constitutional and statutory provisions, and determine the meaning or applicability of the terms of an agency action. The reviewing court shall- (1) compel agency action unlawfully withheld or unreasonably delayed; and (2) hold unlawful and set aside agency action, findings, and conclusions found to be- (A) arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law; (B) contrary to constitutional right, power, privilege, or immunity; (C) in excess of statutory jurisdiction, authority, or limitations, or short of statutory right; (D) without observance of procedure required by law; (E) unsupported by substantial evidence in a case subject to sections 556 and 557 of this title or otherwise reviewed on the record of an agency hearing provided by statute; or (F) unwarranted by the facts to the extent that the facts are subject to trial de novo by the reviewing court. In making the foregoing determinations, the court shall review the whole record or those parts of it cited by a party, and due account shall be taken of the rule of prejudicial error. ( Pub. L. 89–554, Sept. 6, 1966, 80 Stat. 393 .)” Coordinate: 5 U.S.C. § 706; https://www.neochart.com/catalog/federal/title_5/section_706/title5_sec706_9a580d7b5bc7/706_scope_of_review_to_the_extent_necessary_to_decision_and_0001/index.html; data via neochart.com, snapshot 2026-08.
Pin the synthetic computational record
A synthetic retained retrieval core records a dated valid corpus, exact-citation and natural-language queries, normalized tokens and filters, BM-twenty-five and vector configurations, candidate lists, hybrid fusion and reranking, snippets and provenance, adjudicated relevance labels, evaluation definitions without invented results, latency and failure categories, quarantine and abstention.
Work the audited application
The exact Hertz query resolves by citation before lexical ranking. A section Seven-Zero-Six phrase query retrieves the pinned text and shows its source span. Hybrid retrieval broadens a doctrine query, but invalid-title candidates never enter the pool. Relevance labels are assigned by documented human adjudication. Because no measured experiment is run here, the lesson explains metrics and failure analysis but reports no numeric benchmark performance.
Read the populated computational artifact
The search record contains corpus build, scope, query, information need, citation query, normalized query, token, phrase, synonym candidate, jurisdiction filter, date filter, validity filter, BM-twenty-five configuration, field weight, embedding model, chunk, vector, similarity, candidate, rank, fusion method, reranker, dedup, snippet, source URL, relevance judgment, adjudicator, metric definition, measured-result field, latency field, failure, quarantine, abstention, and reviewer. The artifact contains 17 populated rows.
Jurisdiction: US; as of 2026-08-28; not legal advice; Render structure, refuse interpretation, cite, abstain, and hand off.
RENDER STRUCTURE · REFUSE INTERPRETATION · CITE · ABSTAIN · HAND-OFF: render structure, refuse interpretation, cite provenance, abstain when unsupported, and hand off to human review.
Read the complete record
The complete record keeps sources, stated facts, and questions for review separate. Pinned sources and measurements: Verbatim text or bounded snapshot data. case-citations-hertz-inbound-slice as of 2026-08-28: Graph-aware search fixture: The bounded edges support a cited-by retrieval example without implying relevance or authority.. cases_by_law validity-filtered Title 28 sample as of 2026-08-28: Filtered candidate corpus: The valid Title Twenty-Eight sample supplies real records and explicit quarantine context for scope filtering.. 5 U.S.C. § 706: Exact statutory retrieval target: The full provision supports exact citation, phrase, subsection and semantic query examples.. Synthetic computational record: Classroom inputs and intermediate states. Corpus: Dated statute and case snapshot with valid titles, jurisdictions, dates, source URLs, text, citations, licenses and quarantine. Queries: Exact citation, known-item case, natural-language doctrine, fact pattern, term-of-art, negative constraint and date or jurisdiction filter. Runs: BM-twenty-five lexical, dense vector, reciprocal-rank or weighted hybrid, metadata filter, reranker, top candidates, snippets, scores and explanations. Audit trace: Semantics, provenance, execution, evidence, limits and handoff. Scope: Corpus build, authority types, jurisdictions, courts, dates, validity, language, fields, exclusions, quarantine and user need. Query processing: Raw query, citation detection, normalization, spell or synonym candidate, legal phrase, filters, expansion, prohibited expansion and audit. Lexical: Tokenization, fields, term frequency, inverse document frequency, length normalization, BM-twenty-five parameters and exact phrase. Vector: Embedding model and version, chunk, pooling, similarity, domain shift, truncation, multilingual issue and no semantic truth claim. Hybrid and rerank: Candidate union, score normalization, reciprocal-rank fusion or weighted method, cross-encoder or rules, dedup and final ordering. Evaluation: Adjudicated relevance, known item, recall, precision, reciprocal rank, discounted gain, latency, coverage, slice and confidence interval; no invented scores. Failure analysis: Missed vocabulary, wrong scope, stale snapshot, invalid source, chunk boundary, citation error, near duplicate, reranker bias and abstention.
Narrow summary
Scope and filter the corpus, combine lexical and semantic retrieval transparently, evaluate against adjudicated needs, report no invented scores, and treat rank as retrieval—not authority or truth.