Fact or Fiction
Fact or Fiction
Ask any question, including odd ones. You get a percentage, a clear call of more or less than 50%, the working, and the sources that produced it. If nothing matches, the score stays at 50% — nothing is invented.
Likelihood
National Security Archive — September 11th Sourcebooks
52%
Equal to 50% — the sources do not tip either way
The score is 52% — more than 50%. Supporting sources currently outweigh contradicting sources after quality and confidence are applied.
How 52% was calculated
Start at 50%. Move by half of the net source score after uncertainty. Net source score is 1.00 (from −1 contradict to +1 support). Uncertainty is 97%. So 50% + 50% × 1.00 × 3% remaining certainty = 52%.
Supporting sources
2
Weighted strength 0.45
Contradicting sources
0
Weighted strength 0.00
No stance yet
38
Pulls the score toward 50% · 12.51
Uncertainty
97%
Share of the file that is unlabelled or missing
Working
start at 50% + half of (net source score × remaining certainty)
0.5 + 0.5 × 1.00 × (1 − 0.97) = 0.515
This percentage is calculated from the sources listed below — it is a score, not a court finding. Official origin does not add extra weight. Independent origin does not subtract weight. Two papers from the same group are one cluster, not two independent confirmations.
Reasoning
Step 1 · Match the question
No stored question matched closely enough. Search is by keywords in the records only. Unlabelled records are not given a fake yes or no.
Step 2 · Find matching sources
40 source(s) matched the wording. 0 further source(s) already linked to the stored question were included even if they did not contain the search words. 1 matching claim(s) contributed inherited stances.
Step 3 · Assign support or contradiction without inventing
0 labelled from stored question links, 2 from claims, 0 labelled automatically (capped, marked, not saved as human review), 38 left with no stance.
Step 4 · Weight each source
Each source contributes strength = (quality / 5) × confidence × how strongly it agrees or disagrees. Support strength 0.45, contradict strength 0, no-stance strength 12.51. A zero on chain of custody still lowers the mean and stays visible.
Step 5 · Turn that into a percentage
Start at 50%. Move up if support outweighs contradiction, down if the reverse. Unlabelled sources shrink the movement, so a thin file stays near 50%. Working: 0.5 + 0.5 × 1.00 × (1 − 0.97) = 0.515.
Step 6 · What this number is not
This percentage is calculated from the sources listed below — it is a score, not a court finding. Official origin does not add extra weight. Independent origin does not subtract weight. Two papers from the same group are one cluster, not two independent confirmations.
What is still missing
- This question does not match a stored key question closely enough to inherit yes/no labels. Matching records stay unlabelled so the score does not invent a stance.
- 6 source(s) score zero on at least one quality check (shown on each card). Those zeros are kept visible and are not averaged away.
- 10 source(s) are unverified, inactive, or recorded as not retrieved. A missing file is a gap, not a finding against the question.
- 38 relevant source(s) have no stance yet. They increase uncertainty and pull the percentage toward 50%; they are not counted as support or contradiction.
Matching claims
- verifiedCLM-037
A large born-digital public archive of 11 September emails, stories, and images exists and was acquired by the Library of Congress in 2003.
Sources that support this
2September 11 Digital Archive — holdings statement
September 11 Digital Archive (RRCHNM / ASHP) · 2026-09-03
The Archive states a 150,000-item holding and a 2003 Library of Congress acquisition. Public Omeka browse listed 70,359 items on 3 Sep 2026.
claim stance · zeros: contemporaneity · Inherited from matching claim CLM-037.
Quality zeros remain visible: contemporaneity.
911DA collection tree (art, audio, first responders, LoC, user contributions)
September 11 Digital Archive (RRCHNM / ASHP) · 2026-09-03
The Digital Archive exposes a collection tree covering first-responder paper, user stories/emails, Sonic Memorial audio, organisational dumps (Red Cross, CAIR, DoJ emails), and a Library of Congress grouping.
claim stance · zeros: contemporaneity · Inherited from matching claim CLM-037.
Quality zeros remain visible: contemporaneity.
Sources that contradict this
0None in this calculation.
Sources with no stance yet
38September 11th Sourcebooks index (NSArchive volumes I–VII and updates)
National Security Archive — September 11th Sourcebooks · 2026-09-03
The National Security Archive organised a September 11th Sourcebook series of at least seven volumes plus later FOIA postings on Clarke, FAA, and NTSB transcripts.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
NTSB path studies and ATC transcripts FOIA'd by NSArchive (Aug 2006)
NTSB flight-path studies and ATC transcripts released via NSArchive (NSAEBB 196) · 2006-08-11
In August 2006 NTSB released to the National Security Archive the four-flight ATC transcripts, three path studies, and the UA93 DFDR specialist report, after refusing to open its own public docket.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
CIA 9/11 File posting — 100+ FOIA documents, 19 June 2012
The Central Intelligence Agency's 9/11 File (NSAEBB 381) · 2012-06-19
In 2012 the National Security Archive posted 100+ CIA documents cited in Commission footnotes, and stated that this was about one-quarter of the CIA material the Commission cited, with KSM interrogation reports still withheld.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Taliban File update: U.S. pressed Taliban to expel UBL over 30 times
The Taliban File (NSAEBB 97) and updates · 2004-01-30
The National Security Archive's Taliban File update states the U.S. pressed the Taliban to expel bin Laden over 30 times, with only three approaches in the first Bush year.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
IC911 Data Archive — links inactive at ingest
International Center for 9/11 Justice · 2026-09-02
As of 2 September 2026 the IC911 data-archive page states that archive links are inactive and that a large archive of videos, photographs, and documents is being built.
unclassified · zeros: contemporaneity, corroboration, chain_of_custody · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Quality zeros remain visible: contemporaneity, corroboration, chain_of_custody.
The Osama Bin Laden File (NSAEBB 343), posted 2 May 2011
The Osama Bin Laden File (NSAEBB 343) · 2011-05-02
On the day of bin Laden's death the National Security Archive posted an Osama Bin Laden File that is an index of prior FOIA briefing books on UBL, Pakistan, and the Taliban.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Lorie Van Auken and Bob McIlvaine — Toronto Report ch.1 family testimony
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
Two 9/11 family members testified in 2011 about their dead, the Jersey Girls' campaign for a full investigation, three NORAD public timelines, and Van Auken's contemporaneous unease at the Florida classroom footage.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
911DA story: last Windows/observation-deck visit the night of 10 September
September 11 Digital Archive (RRCHNM / ASHP) · 2002-10-22
A October 2002 Digital Archive story claims a visitor party was on the WTC observation deck around 22:00 on 10 September 2001 and was offered rain checks dated 11 September.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Topics
Day-of events, engineering questions, process failures, and foreknowledge leads.