{ "schemaVersion": "1.0.0", "constitutionVersion": "1.0.0", "createdAt": "2026-08-12T00:00:00Z", "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.", "entity": { "type": "project", "id": "chicago-tarp-deep-tunnel", "title": "TARP: Chicago's Deep Tunnel & Reservoir System", "canonicalUrl": "https://1001smartcities.org/projects/chicago-tarp-deep-tunnel/" }, "currentRevisionId": "2026-10-05-baseline", "revisions": [ { "id": "2026-10-05-baseline", "createdAt": "2026-10-05T22:34:47Z", "effectiveAt": "2026-10-05", "changeType": "baseline", "summary": "Created the first structured Evidence Passport with 18 claims and 8 source dossiers.", "preparedBy": { "type": "automation", "label": "AI-assisted evidence preparation", "humanApproved": false }, "review": { "status": "unreviewed", "by": null, "date": null, "note": "Awaiting operator and domain-expert review; publication of this revision implies neither." }, "changes": [ { "operation": "add", "path": "/evidencePassport", "summary": "Added claim-level evidence mapping and source dossiers." }, { "operation": "add", "path": "/revisionHistory", "summary": "Established a permanent, hash-addressed baseline revision." } ], "snapshotHash": "sha256:f73abad17a695d8ea7600f0271c7bf5694141c6f4b80e8f020e39bdb81a4415e", "snapshot": { "asOf": "2026-10-05", "projectFingerprint": "sha256:05ab3e7ff35235f0a1437676dc8650f3b10e18bffd823f9250d62d2d38690ee9", "assurance": { "status": "unreviewed", "scope": "evidence-passport-revision", "statement": "AI-assisted structural preparation. This revision has not been reviewed by a human or subject-matter expert.", "machineChecks": [ "schema", "publication-diff-contract", "material-project-fingerprint", "claim-text-drift", "source-reference-resolution", "complete-source-dossier", "snapshot-hash" ] }, "projectState": { "status": "live", "outcome": "ongoing", "evidenceGrade": "official", "timeline": { "started": 1975, "ended": null } }, "governance": { "operator": "Metropolitan Water Reclamation District of Greater Chicago (MWRD), a county-wide agency separate from the City of Chicago", "actorTypes": [ "utility" ], "fundingModel": "public", "fundingDescription": "MWRD, with federal cost-sharing through the US Army Corps of Engineers", "cost": "$3.861bn total programme cost (MWRD status report, 30 June 2026)", "ownership": null, "decisionRights": null, "exitConditions": null }, "claims": [ { "id": "clm-35e3497fcff2d510", "field": "snippet", "text": "a county agency, not the city", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD describes itself as a special purpose government agency responsible for wastewater treatment and stormwater management in Cook County, and publishes a page on the differences between itself and the Chicago Department of Water Management.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-b9f41ba0708fc4e7", "field": "snippet", "text": "has built TARP since 1975", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: 'TARP tunnel construction began in 1975.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-3a6fa1fbb924c8f6", "field": "snippet", "text": "110 miles of tunnel", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da", "src-905f5de4a1f1d5ee" ], "supportNote": "MWRD: 'four tunnel systems totaling 110 miles of tunnels'; the status report tabulates 110.4 miles.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-408dfb0463afc209", "field": "snippet", "text": "150 to 300 feet down", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: tunnels '8 to 33 feet in diameter and 150 to 300 feet underground'.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-e0443c6cbfbf3f93", "field": "snippet", "text": "feeding reservoirs that now hold over 11 billion gallons", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: 'The system currently has a capacity of more than 11 billion gallons for combined sewage and stormwater.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-22590ba1b87e22c8", "field": "snippet", "text": "MWRD publishes reservoir fill levels on a public live map", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-8f31e8b33b7e0558" ], "supportNote": "MWRD's TARP Reservoir Levels page shows a map of fill levels at Thornton, McCook and Majewski, with a full-screen view and a link to a live view of McCook.", "caveat": "The page states no update interval.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-aabe815e3d8110a4", "field": "snippet", "text": "Overflow days fell from about 100 a year to 50", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: 'Since the tunnels were completed in 2006, CSOs have been reduced from an average of 100 days per year to 50.'", "caveat": "The district's own figure.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-e76203669ab1a602", "field": "snippet", "text": "McCook Stage 2 has slipped to 2032", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-db5fbe1ffae9ee27", "src-905f5de4a1f1d5ee" ], "supportNote": "MWRD (Aug 2025): consent decree required operation by 31 December 2029; 'the current estimate for McCook Stage 2 going online is now Dec. 31, 2032.' The June 2026 status report repeats 2032.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-c7d492567020dc23", "field": "impact", "text": "MWRD reports combined sewer overflows fell from an average of 100 days a year to 50 once the tunnels came online", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: 'Since the tunnels were completed in 2006, CSOs have been reduced from an average of 100 days per year to 50.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-defd61cb87509e8c", "field": "impact", "text": "overflows in the Thornton Composite Reservoir's service area have been eliminated since 2020", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: 'Thornton Reservoir has completely eliminated CSOs within its service area since 2020.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-3f6df8c1e62feada", "field": "impact", "text": "TARP has captured over 1 trillion gallons of combined sewage since 1981", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da" ], "supportNote": "MWRD: 'Since the first portions of the system were put in operation in 1981, TARP has captured over 1 trillion gallons of combined sewage.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-7a4d30b183b648d8", "field": "impact", "text": "about 140 billion of it by McCook Stage 1 alone by June 2026", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-905f5de4a1f1d5ee" ], "supportNote": "Status report as of 30 June 2026: 'Since becoming operational, Stage 1 of the McCook Reservoir has captured approximately 140 billion gallons of combined sewage.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-d2e4d532034512d6", "field": "impact", "text": "the tunnel system captures about 85% of the combined-sewer-overflow pollution from its service area", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-905f5de4a1f1d5ee" ], "supportNote": "Status report: Phase I projects 'capture and enable treatment of about 85% of the combined sewer overflow (CSO) pollution from TARP’s service area.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-f0f94e0a0b868a48", "field": "impact", "text": "All figures are the district's own; no independent evaluation was found", "statementKind": "descriptive", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-5b22692946ae6eed" ], "supportNote": "The only independent technical source on file, a University of Illinois modelling programme, describes model development, not an evaluation of outcomes.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-4435ec2225107b69", "field": "lesson", "text": "Fifty years and more than $3 billion halved overflow days", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-80e956e9e0d826da", "src-09b747e9e81d2eb5", "src-905f5de4a1f1d5ee" ], "supportNote": "Construction began 1975 (MWRD); Wikipedia gives 'over $3 billion' across 30 years of construction and the 2026 status report totals $3.861 billion in contract-award dollars; MWRD reports overflow days cut from 100 to 50.", "caveat": "Costs are contract-award amounts, not adjusted for inflation.", "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-f39f38a0ed70d7b8", "field": "lesson", "text": "in July 2026 McCook sat between 96% and 100% full", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-5fa5fe5b043f01a9" ], "supportNote": "WBEZ: 'The McCook reservoir in southwest suburban Bedford Park fluctuated between 96% and 100% full.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-5bee81a65b0d4f79", "field": "lesson", "text": "311 logged almost 400 complaints of water in basements", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-5fa5fe5b043f01a9" ], "supportNote": "WBEZ: 'The city’s 311 system received almost 400 complaints about water in basements and nearly 600 reports about flooded streets between Thursday and Monday afternoon.'", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } }, { "id": "clm-f20a91e569a4825d", "field": "lesson", "text": "the neighbourhood sewers, which handle about 2 inches of rain before flooding is likely, not the tunnels, are the bottleneck", "statementKind": "quantitative", "textMode": "verbatim-from-project-record", "mappingStatus": "mapped", "sourceRefs": [ "src-8f31e8b33b7e0558", "src-7bf429bb042b71fc" ], "supportNote": "MWRD: basement backups can occur 'even when there is plenty of room in TARP' if small neighbourhood sewers lack capacity; Smart Cities Dive, citing the Chicago Sun-Times: 'the city’s sewers can handle just 2 inches of rain before flooding is likely'.", "caveat": null, "interpretation": { "added": false, "interpolation": false, "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion." } } ], "sources": [ { "id": "src-80e956e9e0d826da", "title": "MWRD — Tunnel and Reservoir Plan (TARP) (authority, operator)", "url": "https://mwrd.org/what-we-do/tunnel-and-reservoir-plan-tarp", "publisher": { "name": null, "domain": "mwrd.org", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-35e3497fcff2d510", "clm-b9f41ba0708fc4e7", "clm-3a6fa1fbb924c8f6", "clm-408dfb0463afc209", "clm-e0443c6cbfbf3f93", "clm-aabe815e3d8110a4", "clm-c7d492567020dc23", "clm-defd61cb87509e8c", "clm-3f6df8c1e62feada", "clm-4435ec2225107b69" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Operator page. Carries the scale and the outcome figures sentence-level: 'four tunnel systems totaling 110 miles of tunnels, 8 to 33 feet in diameter and 150 to 300 feet underground'; 'The system currently has a capacity of more than 11 billion gallons for combined sewage and stormwater'; 'since the first portions of the system were put in operation in 1981, TARP has captured over 1 trillion gallons of combined sewage'; 'CSOs have been reduced from an average of 100 days per year to 50'; Thornton eliminating CSOs in its service area since 2020. Reservoir dates: Majewski 1998, Thornton 2015, McCook Stage 1 2017.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-8f31e8b33b7e0558", "title": "MWRD — TARP Reservoir Levels (authority, the data layer)", "url": "https://mwrd.org/what-we-do/tunnel-and-reservoir-plan-tarp/tunnel-and-reservoir-plan-tarp-reservoir-levels", "publisher": { "name": null, "domain": "mwrd.org", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-22590ba1b87e22c8", "clm-f20a91e569a4825d" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "This is the measurement layer the entry rests on: a public interactive map of live reservoir fill levels, with a full-screen view and a live camera on McCook. The page states no update interval or units, so the entry claims only that fill levels are published live, not any accuracy or frequency.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-db5fbe1ffae9ee27", "title": "MWRD — issues update on the Tunnel and Reservoir Plan, 15 August 2025 (authority)", "url": "https://mwrd.org/news/mwrd-issues-update-tunnel-and-reservoir-plan", "publisher": { "name": null, "domain": "mwrd.org", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-e76203669ab1a602" ], "temporal": { "publishedAt": "2025-08-15", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "Currency source, and the correction that matters: 'The current estimate for McCook Stage 2 going online is now Dec. 31, 2032.' Consent decree entered 6 January 2014 originally required mining complete by 31 December 2028 and operation by 31 December 2029; the delay is attributed to a slowdown in Chicago-area stone demand. Also: McCook Stage 1 'has already captured approximately 130 billion gallons'; Stage 2 brings McCook to 10 billion gallons; the system serves 3.1 million people across Chicago and 36 suburban municipalities.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-5fa5fe5b043f01a9", "title": "WBEZ Chicago — Deep Tunnel nearly full after days of heavy rain, 6 July 2026 (press)", "url": "https://www.wbez.org/environment/2026/07/06/chicago-deep-tunnel-historic-flooding-tarp-reservoir-weather-climate-change", "publisher": { "name": null, "domain": "wbez.org", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-f39f38a0ed70d7b8", "clm-5bee81a65b0d4f79" ], "temporal": { "publishedAt": "2026-07-06", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "Counterweight and 2026 currency, sentence-level: 'The McCook reservoir in southwest suburban Bedford Park fluctuated between 96% and 100% full' after 'more than 8 inches of rain over the past 30 days'; 'The city's 311 system received almost 400 complaints about water in basements and nearly 600 reports about flooded streets between Thursday and Monday afternoon.' Also carries the independent view: 'Experts say that Deep Tunnel isn't enough to prevent flooding.'", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-5b22692946ae6eed", "title": "Ven Te Chow Hydrosystems Laboratory, University of Illinois — Tunnel and Reservoir Plan (academic, boundary source)", "url": "https://vtchl.illinois.edu/tunnel-and-reservoir-plan/", "publisher": { "name": null, "domain": "vtchl.illinois.edu", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-f0f94e0a0b868a48" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Boundary source, and the reason this entry claims no automation: 'The MWRDGC now desires to develop a new, updated and enhanced computer model for each TARP system, to allow real-time control of the TARP systems.' Real-time control is a stated goal of a modelling research programme, not a documented operating system. Earlier models 'were based on design, rather than as-built specifications for the system and are now outdated.'", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-09b747e9e81d2eb5", "title": "Wikipedia — Tunnel and Reservoir Plan (reference)", "url": "https://en.wikipedia.org/wiki/Tunnel_and_Reservoir_Plan", "publisher": { "name": null, "domain": "en.wikipedia.org", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-4435ec2225107b69" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Reference work, used only for dates and cost where MWRD does not state them: 'adopted in 1972, commenced in 1975, and completed and operational by 2006'; '109.4 miles of drainage tunnels ranging from 9 to 33 feet in diameter, up to 350 feet underground'; 'Across 30 years of construction, over $3 billion has been spent on the project.' Its reservoir capacities (Majewski 350 million, Thornton 7.9 billion, McCook Stage 1 3.5 billion gallons) and 2032 Stage 2 date agree with MWRD.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-7bf429bb042b71fc", "title": "Smart Cities Dive — with extreme rainfall overwhelming Chicago's sewers, the city tries a new approach, July 2026 (trade)", "url": "https://www.smartcitiesdive.com/news/chicago-wing-storage-stormwater-underground-detention/825061/", "publisher": { "name": null, "domain": "smartcitiesdive.com", "classification": "not-classified" }, "sourceType": "web-page", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-f20a91e569a4825d" ], "temporal": { "publishedAt": "2026-07-13", "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "publication-and-record-dates-recorded" }, "locator": { "type": "descriptive-source-note", "value": "The city's local answer to TARP's limits, and the source of the agency split: the $12 million Wing Storage pilot is 'a partnership between the Chicago Department of Water Management and the Metropolitan Water Reclamation District of Greater Chicago' — two vaults under West Side streets holding nearly 1.7 million gallons for more than 2,900 buildings, announced 8 July 2026. No sensors, monitoring or control layer is described; water is released back into the sewer as capacity frees up.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } }, { "id": "src-905f5de4a1f1d5ee", "title": "MWRD — TARP Status Report, second quarter of 2026 (August 2026)", "url": "https://mwrd.org/sites/default/files/2026-08/TARP%20STATUS%20REPORT%206.30.2026%20Signed.pdf", "publisher": { "name": null, "domain": "mwrd.org", "classification": "not-classified" }, "sourceType": "pdf", "language": "und", "role": "claim-evidence", "claimRefs": [ "clm-3a6fa1fbb924c8f6", "clm-e76203669ab1a602", "clm-7a4d30b183b648d8", "clm-d2e4d532034512d6", "clm-4435ec2225107b69" ], "temporal": { "publishedAt": null, "updatedAt": null, "sourceCheckedAt": null, "recordLastVerifiedAt": "2026-10-05", "dossierCreatedAt": "2026-10-05", "retrievedAt": null, "status": "record-date-only" }, "locator": { "type": "descriptive-source-note", "value": "Phase I's 110 miles of tunnel capture about 85% of CSO pollution from the service area; McCook Stage 1 has captured about 140 billion gallons; Stage 2 about 75% excavated and expected operational in 2032; total TARP cost $3.861 billion in contract-award dollars.", "exact": false }, "preservation": { "archiveUrl": null, "archivedAt": null, "contentHash": null, "status": "not-captured" } } ], "coverage": { "claimsTotal": 18, "claimsMapped": 18, "sourcesTotal": 8, "sourcesUsedByClaims": 8, "sourcesWithPublicationDate": 3, "sourcesWithArchive": 0, "sourcesWithExactLocator": 0, "sourcesWithContentHash": 0 }, "limits": [ "Publisher names and source languages have not yet been classified; domains are recorded without guessing.", "Existing source notes are descriptive locators, not page- or paragraph-exact citations.", "A missing archive, publication date or content hash is shown as null rather than inferred.", "The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim." ] } } ] }