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
Bažant et al. — pancake / progressive-collapse papers on the WTC towers
56%
More than 50% — weakly supported by the sources
The score is 56% — more than 50%. Supporting sources currently outweigh contradicting sources after quality and confidence are applied.
How 56% was calculated
Start at 50%. Move by half of the net source score after uncertainty. Net source score is 0.31 (from −1 contradict to +1 support). Uncertainty is 63%. So 50% + 50% × 0.31 × 37% remaining certainty = 56%.
Supporting sources
21
Weighted strength 3.37
Contradicting sources
7
Weighted strength 1.79
No stance yet
30
Pulls the score toward 50% · 8.58
Uncertainty
63%
Share of the file that is unlabelled or missing
Working
start at 50% + half of (net source score × remaining certainty)
0.5 + 0.5 × 0.31 × (1 − 0.63) = 0.557
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: H004 — Additional energetic mechanisms contributed to WTC1 collapse. Yes/no labels are taken from sources already linked to that question. Also close: H017, H019, H006.
Step 2 · Find matching sources
40 source(s) matched the wording. 26 further source(s) already linked to the stored question were included even if they did not contain the search words. 6 matching claim(s) contributed inherited stances.
Step 3 · Assign support or contradiction without inventing
26 labelled from stored question links, 9 from claims, 0 labelled automatically (capped, marked, not saved as human review), 23 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 1.79, no-stance strength 8.58. 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 × 0.31 × (1 − 0.63) = 0.557.
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
- 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.
- 6 source(s) are unverified, inactive, or recorded as not retrieved. A missing file is a gap, not a finding against the question.
- 30 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 (H017) also matches this wording. The percentage below is for H004 only — open the other question to compare. Do not average the two numbers.
Closest stored question
H004 · Additional energetic mechanisms contributed to WTC1 collapseengineering · match 9.8
Related questions
Same wording can map to more than one stored question. Each has its own percentage — do not average them.
Matching claims
- disputedCLM-013
Aircraft impact and the ensuing fires initiated the collapses of WTC 1 and WTC 2 without additional energetic devices.
- disputedCLM-016
Explosives or other additional energetic mechanisms contributed to WTC 7's failure.
- disputedCLM-033
First-responder explosion-language about the Twin Towers is evidence of demolition charges.
- unsupportedCLM-023
The twin towers were destroyed by directed energy, not by impact, fire, or conventional explosives.
- disputedCLM-030
WTC 7's entire measurable north and west rooflines instantaneously transitioned to free fall, a behaviour NIST's Stage 1 description conceals.
- partially_supportedCLM-041
The U.S. pressed the Taliban to expel bin Laden more than 30 times, with only three approaches in the first Bush year.
Sources that support this
21Graeme MacQueen — 156 eyewitnesses describing explosions at the Twin Towers (Toronto Report ch.8)
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
MacQueen compiled 156 accounts, mostly FDNY oral histories, in which speakers used explosion/bomb language about the towers; he documents both the original wording and some later retractions.
hypothesis link · human_seed link to H004 (seeded): 156 explosion-language accounts, mostly FDNY. Language ≠ charge ID.
Hulsey et al. (UAF): fire did not cause the observed collapse of WTC 7
Hulsey, Quan, Xiao — University of Alaska Fairbanks WTC 7 study (2019–2020) · 2020-03-01
A University of Alaska Fairbanks team published a model concluding fire did not cause WTC 7's observed collapse.
claim stance · Inherited from matching claim CLM-016.
NIST NCSTAR 1: impact plus fire initiated collapse of WTC 1 and WTC 2
NIST NCSTAR 1 — Final Report on the Collapse of the World Trade Center Towers (2005) · 2005-09-01
NIST published a fire-and-impact initiation sequence for WTC 1 and WTC 2 in 2005.
claim stance · Inherited from matching claim CLM-013.
NIST: tower collapse times ~11 s (WTC1) and ~9 s (WTC2); minimal resistance below
NIST WTC investigation FAQs (towers and WTC 7) · 2011-09-14
NIST published collapse elapsed times near free-fall order and described minimal resistance below the initiation zone.
hypothesis link · human_seed link to H004 (seeded): Minimal-resistance / near-free-fall times are the official sentences demolition arguments cite.
NIST FAQ: WTC 7 north face had a 2.25-second free-fall stage
NIST WTC investigation FAQs (towers and WTC 7) · 2019-11-20
NIST measured a 2.25-second free-fall stage of WTC 7's north face and described negligible support from the structure below.
claim stance · Inherited from matching claim CLM-016.
Harrit et al. 2009: active thermitic red/gray chips in WTC dust
Harrit, Farrer, Jones, Ryan et al., The Open Chemical Physics Journal 2:7–31 (2009) · 2009-04-03
A 2009 peer-reviewed paper reports energetic red/gray chips in WTC dust that the authors identify as unreacted thermitic material.
hypothesis link · human_seed link to H004 (seeded): If thermitic identification holds, additional energetics are in the dust.
Molten metal in the WTC rubble: FDNY/photographs vs NIST aluminium explanation
Harrit, Farrer, Jones, Ryan et al., The Open Chemical Physics Journal 2:7–31 (2009) · 2009-04-03
Witnesses and photographs show molten metal in the WTC debris pile well after 11 September.
hypothesis link · human_seed link to H004 (seeded): Molten metal in rubble is a physical anomaly relative to ordinary office-fire expectations.
Sources that contradict this
7Eagar & Musso 2001: WTC fires did not melt steel; floor-truss connections were the weak point
Thomas W. Eagar & Christopher Musso — Why Did the World Trade Center Collapse? Science, Engineering, and Speculation (JOM, Dec 2001) · 2001-12-01
In December 2001 MIT materials engineers published that WTC fires were not hot enough to melt steel and that weakened floor-truss connections were the likely weak point.
hypothesis link · human_seed link to H004 (seeded): Eagar does not require planted explosives for the towers.
NIST: no corroborating evidence for explosives or thermite
NIST WTC investigation FAQs (towers and WTC 7) · 2019-11-20
NIST published a negative finding on explosives and thermite as collapse causes.
hypothesis link · human_seed link to H004 (seeded): NIST: no corroborating evidence of explosives/thermite.
NIST / critics: red/gray chips consistent with primer paint, not thermite
NIST WTC investigation FAQs (towers and WTC 7) · 2019-11-20
NIST and subsequent paint-chemistry arguments attribute the red chips to known coatings rather than explosives.
hypothesis link · human_seed link to H004 (seeded): Paint-primer reading of red/gray chips.
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 H004 (seeded): PM rejects additional energetics for the towers.
U.S. State Department, 28 August 2006: public-diplomacy page on 'top' 9/11 conspiracy theories
U.S. Department of State — The Top September 11 Conspiracy Theories (28 August 2006) · 2006-08-28
On 28 August 2006 the U.S. State Department published an official webpage rejecting the main 9/11 conspiracy-theory claims then in circulation.
hypothesis link · human_seed link to H004 (seeded): State Department rejects demolition as a communications line, not a new test.
NIST NCSTAR 1A: WTC 7 collapse initiated by fire-induced buckling of Column 79
NIST NCSTAR 1A — Final Report on the Collapse of World Trade Center Building 7 (2008) · 2008-11-20
NIST attributes WTC 7's collapse to fire-induced failure beginning at Column 79, with global collapse at 17:20.
claim stance · Inherited from matching claim CLM-016.
Commission: 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.
claim stance · Inherited from matching claim CLM-023.
Sources with no stance yet
30911DA 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 H004 (seeded): Street 'explosions' during the event are rumblings/impacts as heard from Wall Street, not charge ID.
Wikipedia, 9/11 conspiracy theories — article as finding aid (retrieved 3 Sep 2026)
Wikipedia — 9/11 conspiracy theories (encyclopedia article) · 2026-09-03
On 3 September 2026 the Wikipedia article listed the main 9/11 conspiracy-theory families and pointed at Commission, NIST, State Department, Eagar, and Popular Mechanics as external sources.
hypothesis link · zeros: contemporaneity · human_seed link to H004 (seeded): Catalogues demolition claims; does not itself detect energetics.
Quality zeros remain visible: contemporaneity.
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.
hypothesis link · zeros: contemporaneity · human_seed link to H004 (seeded): Journal catalog is mixed: demolition papers and anti-no-plane papers.
Quality zeros remain visible: contemporaneity.
Rapid recycling of WTC steel before a full forensic metallurgical programme
FEMA 403 — World Trade Center Building Performance Study (2002) · 2002-05-01
Most WTC structural steel was recycled before a full federal engineering investigation existed.
hypothesis link · human_seed link to H004 (seeded): Steel recycling destroyed the best physical evidence either way.
David Chandler — Descent and tilting of the North Tower antenna (Mar 2025)
Journal of 9/11 Studies · 2025-03-01
Chandler published a March 2025 video-measurement paper on North Tower antenna descent and tilt.
hypothesis link · human_seed link to H004 (seeded): Same.
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.
hypothesis link · human_seed link to H004 (seeded): Columbia oral-history catalogue. Explosion-language not retrieved. Zero new weight on energetics.
Wikipedia sub-articles: WTC demolition theories, advance knowledge, 9/11 truth movement
Wikipedia — 9/11 conspiracy theories (encyclopedia article) · 2026-09-03
Wikipedia's demolition, advance-knowledge, and truth-movement pages repeat named sources already on this board; they did not add a new primary measurement.
hypothesis link · zeros: contemporaneity · human_seed link to H004 (seeded): Sub-articles index Jones/Gage/Harrit already stored; no new primary.
Quality zeros remain visible: contemporaneity.
Bažant pancake model vs NIST initiation sequence
Bažant et al. — pancake / progressive-collapse papers on the WTC towers · 2002-01-01
Published official-adjacent models disagree on pancake vs bowing-column initiation of the tower collapses.
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.