Permanent project revision

Clipper: One Card for Two Dozen Bay Area Operators, and the Rebuild That Ran Late

Revision 2026-08-21-source-dates · effective 2026-07-26

Superseded. A later revision exists: 2026-08-22-cross-city-sourcing →

unreviewed

Record the publication date of each source that states one; a source that publishes no date is marked null, and one that shows only a revision carries `updated` instead.

sha256:047366317f8c92f7e18a1e8ceab0f2db46ed1686b1cdc3cb3fe9562eb0ede6d3

Change set

  • replace /snapshot/projectFingerprint — Updated projectFingerprint to the current sourced project record.
  • replace /snapshot/sources — Updated sources to the current sourced project record.
10
of 10 claims mapped
14
source dossiers
7
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-509c573ee7812a3c quantitative
One card has paid fares on about two dozen Bay Area operators since June 2010
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The authority's launch announcement covers the June 2010 renaming of the earlier TransLink system to Clipper. The tertiary source carries the precise date, 16 June 2010, and a count of 24 agencies across the nine-county region as of October 2022.
Caveat
The operator count is quoted inconsistently — MTC material has said 22, the card's own site says 24 transit services, and an independent institute counts 27 operators in the region as a whole — which is why the entry says about two dozen.

Sources carrying this claim

  1. MTC — MTC, Bay Area transit agencies launch Clipper
  2. Wikipedia — Clipper card
Claim 2 clm-dbc9318428300495 descriptive
but MTC runs the card, not the prices, which every agency still sets for itself
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The independent institute states that 'There are 27 different transit operators in the Bay Area and each sets its own fare policy, resulting in a hodgepodge of different fare structures, products, discounts and prices across the region', while the commission manages the card itself. The commission's own fare-policy page describes it as partnering with operators and nowhere claims authority to set their fares.
Caveat
Two instruments that would bear on the question — a commission resolution requiring operators to make Clipper their primary fare system, and a Government Code section letting it adopt rules to coordinate fares — appear in commission material at search level but could not be opened, so neither is claimed.

Sources carrying this claim

  1. SPUR — How Clipper masks the Bay Area's transit fare policy problems (Arielle Fleisher, 31 August 2017)
  2. MTC — transit fare coordination and integration
Claim 3 clm-174bed501b84879c quantitative
A $461M rebuild promised full customer transition by 2023
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2018 approval sets out both the money and the promise: up to $165 million for capital equipment plus $222 million to extend operation and maintenance through 2032, plus $74 million for a 15 per cent contingency and estimated sales taxes — $461 million in total — against a schedule of first improvements in 2019, a mobile payment app in 2020, complete redesign by 2021 and full customer transition by 2023. The press account confirms the contract figure independently.
Caveat
The incumbent vendor was the sole bidding team.

Sources carrying this claim

  1. MTC — Clipper update wins commission approval (26 September 2018)
  2. KQED — Clipper 2.0 was supposed to modernize transit payments. Its rollout was a flop (2 February 2026)
Claim 4 clm-6e53bd2c831c7bc6 quantitative
It launched on 10 December 2025 with bank-card payment and the region's first cross-agency transfer discount
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The transfer discount is $2.85 off the fare, up to the amount of a local fare, for each transfer made within two hours of the first tap; it went live on 10 December 2025 having been approved in March 2023 as an 18-to-24-month pilot. The tertiary source dates the full cutover to the same day and records bank-card and digital-wallet acceptance beginning at one operator in August 2025.
Caveat
The advocacy source is used for the mechanics and calendar of the discount, not for its evaluation.

Sources carrying this claim

  1. Seamless Bay Area — The long road to free transfers (29 January 2026)
  2. Wikipedia — Clipper card
Claim 5 clm-c860a3dd3a11e099 quantitative
A transition planned to take no more than three months was 'coming up on six months...and counting' by 26 May 2026, when Cubic missed the 30 May date to bulk-migrate more than 10 million cards
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The authority's executive director is quoted directly: 'A transition that originally was expected to last no more than three months is now coming up on six months...and counting.' The same release records that the vendor missed its 30 May 2026 target for the performance requirements needed to begin bulk migration of more than 10 million existing cards.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. MTC — Clipper contractor announces more delays for full rollout of next-generation system (26 May 2026)
Claim 6 clm-90ec5ec96336af23 quantitative
KQED, reading MTC documents in March 2026, counted 10 major incidents and over 33 hours of outages since launch, 1.3 million of roughly 15 million cards migrated, $3.4M spent keeping the old system alive and $7.6M on extra customer service against 35,000 calls a month
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Established press reading the authority's and the vendor's own reporting: 10 major incidents totalling over 33 hours of outage since the 10 December launch, including a 3-hour-48-minute failure on 26 March and an earlier outage of more than 12 hours affecting fare inspection devices; only 1.3 million of approximately 15 million cards migrated; $3.4 million allocated to keep the legacy system running into March and $7.6 million for expanded customer service against 35,000 calls a month, well beyond contracted capacity.
Caveat
The card counts conflict: the authority says more than 10 million, this account says roughly 15 million. The entry uses the authority's own, lower figure elsewhere and attributes this one to the outlet.

Sources carrying this claim

  1. KQED — Clipper 2.0 is still seeing hourslong outages, and a full fix is months away (31 March 2026)
Claim 7 clm-27c346bd497d3daa quantitative
The number pointing the other way is also MTC's: 1.7 million discounted transfers, worth over $5.2 million to riders
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same release that carries the delay carries the gain: 1.7 million card transfers processed and over $5.2 million in transfer discounts for riders using more than one agency.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. MTC — Clipper contractor announces more delays for full rollout of next-generation system (26 May 2026)
Claim 8 clm-0278ab7e002d67b5 quantitative
on 1 July 2026 nine operators asked MTC to pursue contractual remedies against the vendor
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Nine operators, including the four largest, wrote to the commission calling on it to 'pursue all contractual remedies' over the vendor's 'problematic implementation' of the new system, ahead of a closed board session on possible legal action.
Caveat
Trade press behind a paywall: the headline and lede were confirmed at search level and the body was not read. No outcome of that session was found as of late July 2026.

Sources carrying this claim

  1. Mobility Payments — Bay Area transit operators urge MTC to pursue all contractual remedies (1 July 2026)
Claim 9 clm-74e1ef0b3b9b9dfb descriptive
Clipper made two dozen operators legible to a rider without touching what any of them charge
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The institute's verdict is in its title, and stated plainly in the text: 'While Clipper has removed a barrier to traveling on multiple transit operators, it did so only by masking this complexity.' It also records why earlier integration failed — a regional fare study was hamstrung by the requirement that solutions not reduce the revenue operators earn from fares, 'a condition that is mathematically nearly impossible to meet'.
Caveat
Dated 2017. Nothing found since contradicts it, and the 2025 transfer discount is the first regional fare instrument in the eight years after.

Sources carrying this claim

  1. SPUR — How Clipper masks the Bay Area's transit fare policy problems (Arielle Fleisher, 31 August 2017)
Claim 10 clm-697031244a86558b descriptive
so when the region finally wanted a cheaper transfer, it could not instruct the agencies, only buy the discount from them with regional money
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The commission's fare page shows what exists: no fare capping, no public all-agency pass, and a no-cost and reduced-cost transfer pilot timed to the December 2025 rollout, advanced through a task force of ten agencies. The programme's own governance board works by consensus under a memorandum of understanding and states no legal authority and no opt-out provision. And the discount now running is a time-limited pilot on set-aside regional money: a November 2026 sales-tax measure estimated at about $1 billion a year lists inter-agency free and reduced-price transfers among the improvements it would fund.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. MTC — transit fare coordination and integration
  2. MTC — Clipper Executive Board
  3. MTC — SB 63 Connect Bay Area Act fact sheet (March 2026)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-21-source-dates effective 2026-07-26 · created 2026-08-22

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:047366317f8c92f7e18a1e8ceab0f2db46ed1686b1cdc3cb3fe9562eb0ede6d3
10
of 10 claims mapped
14
source dossiers
7
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Metropolitan Transportation Commission (MTC), governed with the Clipper Executive Board of transit agency chief executives, with Cubic Transportation Systems as contractor
Actor types
utility, private
Funding model
public
Funding description
Metropolitan Transportation Commission on behalf of the participating operators; the transfer discount runs on regional funds set aside by MTC, not on operator fare revenue
Cost
$461M contract (up to $165M capital, $222M operations to 2032, $74M contingency and sales tax)
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

14 source dossiers

MTC — MTC, Bay Area transit agencies launch Clipper mtc.ca.gov · 1 linked claim

Open original source ↗

Stable source ID
src-17370eb56016119a
Publisher
Name not classified · mtc.ca.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The authority's own launch announcement for the renaming of the TransLink system to Clipper in June 2010, the basis for yearStart 2010. The precise date, 16 June 2010, is carried by Wikipedia rather than by this release.

Descriptive only — not page/paragraph exact
MTC — Clipper update wins commission approval (26 September 2018) mtc.ca.gov · 1 linked claim

Open original source ↗

Stable source ID
src-8b5ed93914635949
Publisher
Name not classified · mtc.ca.gov
Type / language
web-page · language not classified
Published
2018-09-26
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The load-bearing document for both the money and the promise. Contract to Cubic Transportation Systems: 'up to $165 million for capital equipment plus $222 million to extend Cubic's operation and maintenance of the system through 2032', plus '$74 million to provide a 15 percent contingency and to cover estimated sales taxes on equipment purchases', total $461 million. And the original schedule MTC set for itself: contract start autumn 2018, first improvements 2019, mobile payment app 2020, complete redesign by 2021, full customer transition by 2023. Cubic was the incumbent and the sole bidding team.

Descriptive only — not page/paragraph exact
MTC — Clipper contractor announces more delays for full rollout of next-generation system (26 May 2026) mtc.ca.gov · 2 linked claims

Open original source ↗

Stable source ID
src-7ac3bc14ac59afa0
Publisher
Name not classified · mtc.ca.gov
Type / language
web-page · language not classified
Published
2026-05-26
Updated
2026-06-01
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Sentence-level source for the slippage in the authority's own words. MTC Executive Director Andrew Fremier: 'A transition that originally was expected to last no more than three months is now coming up on six months...and counting.' Cubic missed its 30 May 2026 target for the performance requirements needed to begin bulk migration of more than 10 million existing Clipper cards. Same release carries the positive figures used in the impact field: 1.7 million card transfers processed and over $5.2 million in transfer discounts for riders using more than one agency.

Descriptive only — not page/paragraph exact
KQED — Clipper 2.0 is still seeing hourslong outages, and a full fix is months away (31 March 2026) kqed.org · 1 linked claim

Open original source ↗

Stable source ID
src-40812fcc1e081ff9
Publisher
Name not classified · kqed.org
Type / language
web-page · language not classified
Published
2026-03-31
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Established press reading MTC and Cubic reporting; the source of every failure number in the impact field. Cubic reported 10 major incidents totalling over 33 hours of outage since the 10 December launch, including a 3-hour-48-minute failure on 26 March and an earlier 12-hour-plus outage affecting fare inspection devices. Only 1.3 million of approximately 15 million cards had been migrated. MTC allocated $3.4 million to keep legacy Clipper running into March and $7.6 million for expanded customer service against 35,000 calls a month, well beyond contracted capacity; a July 2025 outage cost BART $386,005. MTC on remedies: the contract 'provides certain methods of redress for underperformance by Cubic. Staff are currently engaged in evaluation of our options.' Note the card-count conflict: MTC says more than 10 million, this article says roughly 15 million; the entry uses MTC's own, lower figure.

Descriptive only — not page/paragraph exact
KQED — Clipper 2.0 was supposed to modernize transit payments. Its rollout was a flop (2 February 2026) kqed.org · 1 linked claim

Open original source ↗

Stable source ID
src-9248359680a2a073
Publisher
Name not classified · kqed.org
Type / language
web-page · language not classified
Published
2026-02-02
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

What the failure looked like to riders six and a half weeks in: system crashes blocking account access, failures upgrading existing accounts, ticket machines taking money without crediting cards, fare inspection devices not recognising paid fares, autoload malfunctions, and accounting irregularities for the agencies. One rider had been locked out of an account for 48 days after five calls to support. Confirms the $461 million contract figure independently of MTC.

Descriptive only — not page/paragraph exact
Mobility Payments — Bay Area transit operators urge MTC to pursue all contractual remedies (1 July 2026) mobility-payments.com · 1 linked claim

Open original source ↗

Stable source ID
src-2d09b44bc98aba78
Publisher
Name not classified · mobility-payments.com
Type / language
web-page · language not classified
Published
2026-07-01
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The currency check and the strongest recent development: nine operators, including the four largest, wrote to MTC calling on it to 'pursue all contractual remedies' against Cubic over its 'problematic implementation of the Clipper 2.0 system', ahead of a closed MTC board session on possible legal action. Trade press behind a paywall; headline and lede confirmed at search level, body not read. No outcome of that session was found as of late July 2026.

Descriptive only — not page/paragraph exact
SPUR — How Clipper masks the Bay Area's transit fare policy problems (Arielle Fleisher, 31 August 2017) spur.org · 2 linked claims

Open original source ↗

Stable source ID
src-674518a7035acf86
Publisher
Name not classified · spur.org
Type / language
web-page · language not classified
Published
2017-08-31
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Independent urban-policy institute, and the source of the governance finding the entry is built on. 'There are 27 different transit operators in the Bay Area and each sets its own fare policy, resulting in a hodgepodge of different fare structures, products, discounts and prices across the region', while MTC manages Clipper itself. On why earlier integration failed: 'MTC explored regional fare coordination nearly a decade ago, but the study was hamstrung by the requirement that solutions not negatively impact the revenues operators earn from fares — a condition that is mathematically nearly impossible to meet.' And the verdict in the title: 'While Clipper has removed a barrier to traveling on multiple transit operators, it did so only by masking this complexity.' Dated 2017, but nothing found since contradicts it, and the 2025 transfer discount is the first regional fare instrument in the eight years after.

Descriptive only — not page/paragraph exact
MTC — Clipper Executive Board mtc.ca.gov · 1 linked claim

Open original source ↗

Stable source ID
src-c97412f4f585cdb1
Publisher
Name not classified · mtc.ca.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Operator source for how the programme is actually governed. The board was formed by a memorandum of understanding between MTC and the transit agencies and seats top executives of MTC, AC Transit, BART, the Golden Gate Bridge Highway and Transportation District, SFMTA, SamTrans and VTA, plus two representatives of the remaining MOU parties. It 'works by consensus to establish goals, a budget, and work plan, and provide policy, oversight, direction and authorization of significant business matters for the Clipper fare payment system.' Chaired in 2026 by Julie Kirschbaum of SFMTA. The page states no legal authority and no opt-out provision; MTC Resolution 3866, which requires operators to make Clipper their primary fare payment system, and Government Code section 66516, which lets MTC adopt rules to coordinate fares, both appear in MTC material at search level but could not be opened, so neither is claimed in the entry.

Descriptive only — not page/paragraph exact
MTC — transit fare coordination and integration mtc.ca.gov · 2 linked claims

Open original source ↗

Stable source ID
src-e09fb101d95705e7
Publisher
Name not classified · mtc.ca.gov
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The authority's current statement of regional fare policy, and the source for a negative finding that matters: there is no fare capping and no public all-agency pass. What exists is the no-cost and reduced-cost transfer pilot, timed to the December 2025 Clipper rollout, and the Clipper BayPass, still a pilot in its second phase. Fare policy is advanced through a Fare Integration Task Force of ten agencies; the page describes MTC as partnering with operators and nowhere claims authority to set their fares.

Descriptive only — not page/paragraph exact
Seamless Bay Area — The long road to free transfers (29 January 2026) seamlessbayarea.org · 1 linked claim

Open original source ↗

Stable source ID
src-d6ed7e813ea6676b
Publisher
Name not classified · seamlessbayarea.org
Type / language
web-page · language not classified
Published
2026-01-29
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Advocacy organisation, used for the mechanics and the calendar of the transfer discount: '$2.85 off the fare (up to the amount of a local fare) for each transfer made within two hours of their first tap', live 10 December 2025, approved by MTC on 27 March 2023 as an 18 to 24 month pilot. Also the equity gap that this entry carries: the discount is automatically available to people paying with credit and debit cards, while low-income, youth and senior riders cannot yet get their discounts through contactless payment.

Descriptive only — not page/paragraph exact
Transform — Pay with your credit card on transit starting December 10 (2025) transformca.org · background

Open original source ↗

Stable source ID
src-6d8afa966e1c5c79
Publisher
Name not classified · transformca.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Sentence-level source for the excluded group, and the reason the entry does not repeat the Los Angeles cash-rider framing: 'Discounted fares through Clipper Youth, Senior, RTC, and Clipper START programs are NOT available through contactless bank card payment. Riders must still use their discount program-issued Clipper cards.' No source found in this review states whether cash-paying riders receive any regional transfer benefit, so the entry makes no claim about them.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Wikipedia — Clipper card en.wikipedia.org · 2 linked claims

Open original source ↗

Stable source ID
src-5ae5be91ee4e6280
Publisher
Name not classified · en.wikipedia.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Tertiary, used only where operator sources were unreachable, and flagged as such. Carries the rename date, 16 June 2010, from TransLink; the count of 24 agencies across the nine-county Bay Area as of October 2022; the $3 adult card fee introduced on 1 September 2012 and waived when the card is registered for Autoload at purchase; BART's start of contactless bank card and digital wallet acceptance on 20 August 2025; and the full Clipper 2.0 cutover on 10 December 2025. The operator count is quoted inconsistently across sources — MTC material has said 22, clippercard.com says 24 transit services, SPUR counts 27 operators in the region as a whole — so the entry says about two dozen.

Descriptive only — not page/paragraph exact
Clipper on SMART — cash value FAQ sonomamarintrain.org · background

Open original source ↗

Stable source ID
src-7f8310b4ce7d20e1
Publisher
Name not classified · sonomamarintrain.org
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Participating-operator FAQs are the accessible source for the balance rule, and it is the opposite of the Manila pattern: cash value loaded on a Clipper card does not expire, while time-limited passes and tickets do. clippercard.com's own FAQ page returned 404 to automated fetching. No forfeiture mechanism for stored value was found.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
MTC — SB 63 Connect Bay Area Act fact sheet (March 2026) mtc.ca.gov · 1 linked claim

Open original source ↗

Stable source ID
src-3b86bcee45049a71
Publisher
Name not classified · mtc.ca.gov
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-26
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Currency and the funding fight behind the fare policy. SB 63 authorises a November 2026 regional sales-tax measure estimated to raise about $1 billion a year for Muni, BART, AC Transit, Caltrain and others, with a maintenance-of-effort requirement on the major operators, and MTC lists inter-agency free and reduced-price transfers among the rider improvements it would fund. The transfer discount now running is a time-limited pilot on set-aside regional money, so whether it survives is a ballot question, not an operational one.

Descriptive only — not page/paragraph exact
Known limits of this passport
  • 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.