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
Project for a New American Century — Rebuilding America's Defenses (September 2000)
60%
More than 50% — weakly supported by the sources
The score is 60% — more than 50%. Supporting sources currently outweigh contradicting sources after quality and confidence are applied.
How 60% was calculated
Start at 50%. Move by half of the net source score after uncertainty. Net source score is 0.87 (from −1 contradict to +1 support). Uncertainty is 77%. So 50% + 50% × 0.87 × 23% remaining certainty = 60%.
Supporting sources
10
Weighted strength 3.37
Contradicting sources
1
Weighted strength 0.24
No stance yet
35
Pulls the score toward 50% · 11.64
Uncertainty
77%
Share of the file that is unlabelled or missing
Working
start at 50% + half of (net source score × remaining certainty)
0.5 + 0.5 × 0.87 × (1 − 0.77) = 0.600
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: H001 — AA11 struck WTC1. Yes/no labels are taken from sources already linked to that question. Also close: H008, H012, H020.
Step 2 · Find matching sources
40 source(s) matched the wording. 5 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
5 labelled from stored question links, 6 from claims, 0 labelled automatically (capped, marked, not saved as human review), 35 left with no stance.
Step 4 · Weight each source
Each source contributes strength = (quality / 5) × confidence × how strongly it agrees or disagrees. Support strength 3.37, contradict strength 0.24, no-stance strength 11.64. 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 × 0.87 × (1 − 0.77) = 0.600.
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
- 7 source(s) score zero on at least one quality check (shown on each card). Those zeros are kept visible and are not averaged away.
- 9 source(s) are unverified, inactive, or recorded as not retrieved. A missing file is a gap, not a finding against the question.
- 35 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 (H008) also matches this wording. The percentage below is for H001 only — open the other question to compare. Do not average the two numbers.
Closest stored question
H001 · AA11 struck WTC1day-of · match 7.2
Related questions
Same wording can map to more than one stored question. Each has its own percentage — do not average them.
Matching claims
- verifiedCLM-011
American Airlines Flight 11 struck World Trade Center 1 at 08:46:40 on 11 September 2001.
- disputedCLM-020
Able Danger identified Mohamed Atta's cell before 11 September and was blocked from notifying the FBI.
- 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.
Sources that support this
10Commission: AA11 struck WTC1 at 08:46:40
9/11 Commission Report · 2004-07-22
A large aircraft identified as AA11 struck WTC 1 at 08:46:40 on 11 September 2001.
hypothesis link · human_seed link to H001 (seeded): Commission + live video of AA11 into WTC1.
Sonic Memorial: Eva Garfield Greenwich Village voicemails, 11 September
September 11 Digital Archive (RRCHNM / ASHP) · 2001-09-11
The Sonic Memorial collection includes saved 11 September voicemails in which Eva Garfield, from Greenwich Street, says she watched the towers fall, plus other WTC-building memory recordings.
hypothesis link · human_seed link to H001 (seeded): Village voicemail caption: watched the towers fall.
Able Danger: Shaffer/Weldon say Atta's Brooklyn cell was identified before 9/11
Able Danger hearings and Lt. Col. Anthony Shaffer / Rep. Curt Weldon statements (2005) · 2005-09-21
Able Danger officers testified they had identified Atta before 9/11 and were blocked from notifying the FBI. Commission staff found the claim unsupported.
claim stance · Inherited from matching claim CLM-020.
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.
hypothesis link · human_seed link to H001 (seeded): AA11 path study in the same FOIA set.
Eric Salter — Critical review of WTC 'no plane' theories (Sep 2006)
Journal of 9/11 Studies · 2006-09-01
The journal published a 2006 critical review of no-plane theories for the WTC.
hypothesis link · human_seed link to H001 (seeded): In-cluster critique of no-plane theories.
911DA email: 6 blocks from Ground Zero, second-plane sound
September 11 Digital Archive (RRCHNM / ASHP) · 2001-09-12
A public-archive email describes street-level ash, paper, a 08:53 Wall Street exit, and the sound of a second aircraft hitting the South Tower from 5–6 blocks away, plus a Pentagon-evacuation report from Washington.
hypothesis link · human_seed link to H001 (seeded): Street-level ash/paper after 08:53 plus a second aircraft sound is consistent with AA11 then UA175.
CIA had Mihdhar visa information in January 2000; FBI notified August 2001
9/11 Commission Report · 2004-07-22
U.S. intelligence possessed Mihdhar's visa/travel data in January 2000 and did not get it to FBI watchlisting until August 2001.
claim stance · Inherited from matching claim CLM-007.
Sources that contradict this
1Commission staff: Able Danger Atta identification not substantiated
9/11 Commission Report · 2005-08-12
Commission staff published that they could not substantiate a pre-9/11 Able Danger identification of Atta.
claim stance · Inherited from matching claim CLM-020.
Sources with no stance yet
35PNAC 2000: 'catastrophic and catalyzing event — like a new Pearl Harbor'
Project for a New American Century — Rebuilding America's Defenses (September 2000) · 2000-09-01
A 2000 PNAC report used a 'new Pearl Harbor' clause about the pace of military transformation.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Poteshman 2006: unusual put-option volume on airlines before 9/11
Allen M. Poteshman, 'Unusual Option Market Activity and the Terrorist Attacks of September 11, 2001,' Journal of Business 79(4) (2006) · 2006-07-01
A peer-reviewed study found statistically unusual pre-attack put-option activity in airline stocks.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
AA77 hijacked; Hazmi and Mihdhar aboard; Pentagon impact
9/11 Commission Report · 2004-07-22
The two men assisted in San Diego in 2000 were AA77 hijackers on 11 September 2001.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Columbia 9/11 Oral History Project — holdings statement
Columbia Center for Oral History Research — September 11 Oral History Project · 2026-09-03
Columbia's 9/11 oral-history project reports five programmes, over 900 hours with over 600 people, 351 of them open, plus a 2011 book. Transcripts were not ingested.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Paul Zarembka — Insider trading before 9/11 re-examined (Toronto Report ch.6)
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
A 2012 hearing paper surveys three academic option-market studies and argues the combined pre-attack activity is not plausibly random, while treating UAL/AMR themselves as weak because of hedging.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Veterans History Project — Iraq War box; loc.gov 403
SHSU Library — U.S. History: Primary Source Collections Online (9/11 page) · 2026-09-03
The guide's Iraq-war Veterans History Project link did not yield files at ingest.
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.
Natalie Schilling — Linguistic analysis of AA11 transmissions purported to be Mohamed Atta (Apr 2026)
Natalie Schilling, Linguistic Analysis of AA11 transmissions purported to be Mohamed Atta (April 2026) and addendum (August 2026) · 2026-04-01
A 2026 linguistic report on AA11 audio attributed to Atta was published under IC911 Reports, authored by Natalie Schilling, Ph.D.
unclassified · zeros: contemporaneity · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Quality zeros remain visible: contemporaneity.
Natalie Schilling — Addendum covering AA11 and UA93 audio (Aug 2026)
Natalie Schilling, Linguistic Analysis of AA11 transmissions purported to be Mohamed Atta (April 2026) and addendum (August 2026) · 2026-08-01
An August 2026 addendum expands the Schilling linguistic work from AA11 to UA93 audio.
unclassified · zeros: contemporaneity · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Quality zeros remain visible: contemporaneity.
Topics
Day-of events, engineering questions, process failures, and foreknowledge leads.