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
NTSB flight-path studies and ATC transcripts released via NSArchive (NSAEBB 196)
46%
Equal to 50% — the sources do not tip either way
The score is 46% — less than 50%. Contradicting sources currently outweigh supporting sources after quality and confidence are applied.
How 46% was calculated
Start at 50%. Move by half of the net source score after uncertainty. Net source score is -0.21 (from −1 contradict to +1 support). Uncertainty is 59%. So 50% + 50% × -0.21 × 41% remaining certainty = 46%.
Supporting sources
11
Weighted strength 2.29
Contradicting sources
8
Weighted strength 3.52
No stance yet
28
Pulls the score toward 50% · 8.23
Uncertainty
59%
Share of the file that is unlabelled or missing
Working
start at 50% + half of (net source score × remaining certainty)
0.5 + 0.5 × -0.21 × (1 − 0.59) = 0.457
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
Closest stored question: H014 — The Pentagon was not struck by AA77 (missile or other object). Yes/no labels are taken from sources already linked to that question. Also close: H019, H001, H013.
Step 2 · Find matching sources
40 source(s) matched the wording. 14 further source(s) already linked to the stored question were included even if they did not contain the search words. 3 matching claim(s) contributed inherited stances.
Step 3 · Assign support or contradiction without inventing
14 labelled from stored question links, 8 from claims, 0 labelled automatically (capped, marked, not saved as human review), 25 left with no stance.
Step 4 · Weight each source
Each source contributes strength = (quality / 5) × confidence × how strongly it agrees or disagrees. Support strength 2.29, contradict strength 3.52, no-stance strength 8.23. 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 × -0.21 × (1 − 0.59) = 0.457.
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
- 9 source(s) score zero on at least one quality check (shown on each card). Those zeros are kept visible and are not averaged away.
- 4 source(s) are unverified, inactive, or recorded as not retrieved. A missing file is a gap, not a finding against the question.
- 28 relevant source(s) have no stance yet. They increase uncertainty and pull the percentage toward 50%; they are not counted as support or contradiction.
- A second stored question (H019) also matches this wording. The percentage below is for H014 only — open the other question to compare. Do not average the two numbers.
Closest stored question
H014 · The Pentagon was not struck by AA77 (missile or other object)day-of · match 5.9
Related questions
Same wording can map to more than one stored question. Each has its own percentage — do not average them.
Matching claims
- verifiedCLM-040
NTSB produced flight-path studies and ATC transcripts for the four hijacked flights and initially refused a public docket.
- verifiedCLM-007
U.S. agencies had actionable information on Mihdhar's U.S. visa in January 2000 and failed to watchlist him until August 2001.
- partially_supportedCLM-003
Omar al-Bayoumi was a paid cooptee of Saudi GIP reporting via Ambassador Bandar.
Sources that support this
11UA93 ACARS 09:23 and 09:28 mayday — NSAEBB 196 quotation
NTSB flight-path studies and ATC transcripts released via NSArchive (NSAEBB 196) · 2001-09-11
NTSB ACARS/ATC text quoted by NSArchive: UA93 received a 09:23 warning about cockpit intrusion and the NY impacts, then at 09:28 transmitted a mayday / 'hey get out of here' as it was hijacked.
claim stance · Inherited from matching claim CLM-040.
CIT / no-Boeing-at-Pentagon claim
Citizen Investigation Team / Pentagon no-Boeing claims · 2009-01-01
A set of independent researchers published a no-Boeing account of the Pentagon event, citing selected witnesses and façade photos.
hypothesis link · zeros: contemporaneity, corroboration, chain_of_custody · human_seed link to H014 (seeded): CIT no-Boeing claim — low quality, still a cited object.
Quality zeros remain visible: contemporaneity, corroboration, chain_of_custody.
Barbara Honegger — Evidence of explosives at the Pentagon (Toronto Report ch.13)
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
Honegger compiles Pentagon witnesses who used bomb/cordite language, cites stopped clocks around 9:31–9:32, and treats the FBI code name PENTTBOM as evidence of a bombing investigation.
hypothesis link · human_seed link to H014 (seeded): Honegger inside-explosives / no-757-compatible Pentagon chapter.
David Ray Griffin — Anomalies in official accounts of AA77 and UA93 (Toronto Report ch.7)
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
Griffin's 2012 chapter lists named process contradictions on AA77 notification and UA93 notification, plus Pentagon-object and UA93-shoot-down arguments with named witnesses and an FAA memo.
hypothesis link · human_seed link to H014 (seeded): Griffin ch.7 argues AA77 did not hit the Pentagon. In-cluster contradicts exist.
FBI 2017: Bayoumi paid as GIP cooptee via Ambassador Bandar
FBI materials released under Executive Order 14040 · 2017-06-14
An official FBI analytical document asserts Bayoumi was a paid GIP cooptee through Bandar, 1998–2001.
claim stance · Inherited from matching claim CLM-003.
FBI 2017: Bayoumi reporting channel through Bandar to GIP
FBI materials released under Executive Order 14040 · 2017-06-14
FBI analysis describes Bayoumi as a community collector reporting via the ambassador.
claim stance · Inherited from matching claim CLM-003.
CIA email 21 August 2001: 'Re: Khalid Al-Mihdhar'
The Central Intelligence Agency's 9/11 File (NSAEBB 381) · 2001-08-21
A CIA email dated 21 August 2001 is titled Re: Khalid Al-Mihdhar and is a Commission Chapter 8 citation.
claim stance · Inherited from matching claim CLM-007.
Sources that contradict this
8NTSB 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.
hypothesis link · human_seed link to H014 (seeded): NTSB AA77 path study is a principal official contradict of a non-757 Pentagon object.
NTSB flight-path study: AA77 from Dulles to the Pentagon
NTSB flight-path studies, Air Traffic Control tapes, and CVR/FDR summaries (AA11, UA175, AA77, UA93) · 2002-02-19
NTSB reconstructed a continuous radar/path track of AA77 from takeoff to the Pentagon.
hypothesis link · human_seed link to H014 (seeded): NTSB continuous path.
Legge & Stutt — AA77 FDR analysis supports official Pentagon flight path (Jan 2011)
Journal of 9/11 Studies · 2011-01-01
A 2011 Journal of 9/11 Studies FDR analysis concludes the official AA77 path to Pentagon impact is supported.
hypothesis link · human_seed link to H014 (seeded): In-cluster FDR paper supports official AA77 path.
Popular Mechanics 2005/2006: magazine investigation rejecting demolition, Pentagon-missile, and UA93 shoot-down claims
Popular Mechanics — 9/11: Debunking the Myths (March 2005) and Debunking 9/11 Myths (Hearst, 2006) · 2005-03-01
In 2005–2006 Popular Mechanics published a magazine investigation and a book arguing that the main demolition, missile, and shoot-down claims do not stand up to wreckage and engineering testimony.
hypothesis link · human_seed link to H014 (seeded): PM rejects Pentagon-missile / no-Boeing.
Commission: AA77 struck the Pentagon at 09:37:46
9/11 Commission Report · 2004-07-22
The Commission states AA77 struck the Pentagon at 09:37:46.
hypothesis link · human_seed link to H014 (seeded): Commission AA77-into-Pentagon.
ASCE Pentagon building performance: 757-class impact damage
ASCE/SEI Pentagon Building Performance Report (2003) · 2003-01-01
An engineering team mapped interior damage consistent with a large-aircraft mass trajectory through the Pentagon.
hypothesis link · human_seed link to H014 (seeded): ASCE interior aircraft-mass damage path.
John D. Wyndham — Problems with theories alternative to large-plane impact at the Pentagon (Nov 2011)
Journal of 9/11 Studies · 2011-11-01
The Journal of 9/11 Studies published a 2011 paper arguing that theories alternative to a large-plane Pentagon impact have problems.
hypothesis link · human_seed link to H014 (seeded): In-cluster journal paper against alternatives to large-plane impact.
Commission character assessment of Bayoumi
9/11 Commission Report · 2004-07-22
The 2004 Commission published a negative finding on Bayoumi's knowing extremist involvement.
claim stance · Inherited from matching claim CLM-003.
Sources with no stance yet
28Piers Robinson — Manual or Automated? Flight simulation of reported 9/11 aircraft manoeuvres (May 2026)
Piers Robinson, Manual or Automated? Flight simulation study of reported 9/11 aircraft manoeuvres (May 2026) · 2026-05-01
IC911 published a May 2026 Robinson report whose title frames reported 9/11 manoeuvres as a manual-vs-automated question.
hypothesis link · zeros: contemporaneity · human_seed link to H014 (seeded): Flight-sim title does not decide whether AA77 hit the Pentagon; it asks how manoeuvres were flown.
Quality zeros remain visible: contemporaneity.
Piers Robinson — Preliminary evaluation of flight-simulator data, UA175 and AA77 (10 Sep 2025)
International Center for 9/11 Justice · 2025-09-10
Robinson presented a 2025 preliminary simulator evaluation of UA175 and AA77 control.
hypothesis link · zeros: contemporaneity · human_seed link to H014 (seeded): UA175/AA77 simulator title; body not read.
Quality zeros remain visible: contemporaneity.
Ted Walter — The 9/11 Hijacking Myth Exposed (presentation, 8 Sep 2024)
International Center for 9/11 Justice · 2024-09-08
Walter presented a 2024 IC911 talk arguing hijacker piloting of the reported manoeuvres is implausible.
hypothesis link · zeros: contemporaneity · human_seed link to H014 (seeded): Hijacking-myth framing is about piloting, not necessarily about a different object at the Pentagon.
Quality zeros remain visible: contemporaneity.
Flight 93: white jet / C-130 and shoot-down rumours
NTSB flight-path studies, Air Traffic Control tapes, and CVR/FDR summaries (AA11, UA175, AA77, UA93) · 2001-09-11
Other aircraft were near UA93 at the end, and wreckage was distributed along a path, not a single postage-stamp hole only.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Journal of 9/11 Studies — full article catalog (2006–2025)
Journal of 9/11 Studies · 2026-09-02
IC911 hosts a journal catalog of 70+ items. Several flight papers (Wyndham 2011, Legge & Stutt 2011, Salter 2006) argue against no-plane / no-Boeing theories.
unclassified · zeros: contemporaneity · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Quality zeros remain visible: contemporaneity.
September 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.
CIA IG August 2001: CTC practices reviewed positively — vs later OIG/Commission
The Central Intelligence Agency's 9/11 File (NSAEBB 381) · 2001-08-01
NSArchive records that a CIA Inspector General review completed in August 2001 praised CTC information-management and FBI cooperation, in contrast to the 2004 CIA OIG and the Commission.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Piers Robinson — Researching 9/11 and Beyond: Current Knowledge and Future Directions (Aug 2024)
Journal of 9/11 Studies · 2024-08-01
Robinson's 2024 survey cites Harrit 2009, Hulsey 2020, MacQueen eyewitness counts, NIST NCSTAR, the Commission, Ashton v KSA, and a 2023 Klarenberg claim of a CIA-Saudi recruiting operation involving two hijackers. He states official investigations are flawed and demolition of WTC 1/2/7 is most likely.
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.