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
NIST NCSTAR 1 — Final Report on the Collapse of the World Trade Center Towers (2005)
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 0.39 (from −1 contradict to +1 support). Uncertainty is 68%. So 50% + 50% × 0.39 × 32% remaining certainty = 56%.
Supporting sources
10
Weighted strength 3.02
Contradicting sources
7
Weighted strength 1.31
No stance yet
28
Pulls the score toward 50% · 9.25
Uncertainty
68%
Share of the file that is unlabelled or missing
Working
start at 50% + half of (net source score × remaining certainty)
0.5 + 0.5 × 0.39 × (1 − 0.68) = 0.562
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: H005 — WTC7 collapse resulted from fire-induced structural failure. Yes/no labels are taken from sources already linked to that question. Also close: H006, H004, H003.
Step 2 · Find matching sources
40 source(s) matched the wording. 10 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
10 labelled from stored question links, 9 from claims, 0 labelled automatically (capped, marked, not saved as human review), 26 left with no stance.
Step 4 · Weight each source
Each source contributes strength = (quality / 5) × confidence × how strongly it agrees or disagrees. Support strength 3.02, contradict strength 1.31, no-stance strength 9.25. 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 × 0.39 × (1 − 0.68) = 0.562.
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
- 3 source(s) score zero on at least one quality check (shown on each card). Those zeros are kept visible and are not averaged away.
- 5 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 (H006) also matches this wording. The percentage below is for H005 only — open the other question to compare. Do not average the two numbers.
Closest stored question
H005 · WTC7 collapse resulted from fire-induced structural failureengineering · match 15.5
Related questions
Same wording can map to more than one stored question. Each has its own percentage — do not average them.
Matching claims
- disputedCLM-032
NIST NCSTAR reports on the WTC are false as engineering explanations.
- disputedCLM-013
Aircraft impact and the ensuing fires initiated the collapses of WTC 1 and WTC 2 without additional energetic devices.
- well_supportedCLM-042
About three-quarters of CIA materials cited by the 9/11 Commission, including all KSM interrogation reports, remained withheld as of the 2012 File posting.
- disputedCLM-033
First-responder explosion-language about the Twin Towers is evidence of demolition charges.
- verifiedCLM-011
American Airlines Flight 11 struck World Trade Center 1 at 08:46:40 on 11 September 2001.
- disputedCLM-015
WTC 7 collapsed from ordinary office fires following debris impact, without explosives.
Sources that support this
10NIST 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 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.
hypothesis link · human_seed link to H005 (seeded): NIST Column 79 fire-induced sequence.
FEMA 2002: WTC 7 fire-induced progressive collapse; further study needed
FEMA 403 — World Trade Center Building Performance Study (2002) · 2002-05-01
An early official engineering team attributed WTC 7 to fire while flagging that the mechanism was not fully understood.
hypothesis link · human_seed link to H005 (seeded): FEMA 2002 fire-induced working hypothesis.
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-011.
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 H005 (seeded): NIST negative on explosives for WTC 7 as well as the towers.
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.
claim stance · Inherited from matching claim CLM-011.
MacQueen — 118 Witnesses: Firefighters' testimony to explosions (Journal of 9/11 Studies, Aug 2006)
Journal of 9/11 Studies · 2006-08-01
In 2006 MacQueen published a compilation of 118 firefighter explosion-language statements drawn from FDNY oral histories.
claim stance · Inherited from matching claim CLM-033.
Sources that contradict this
7Kevin R. Ryan — Why the NIST World Trade Center Reports are False (Toronto Report ch.3)
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
Ryan cites NIST test and model figures (steel temperatures, sag, expansion, fire duration) and states they do not support the published collapse sequences; he notes NIST did not release its global models for independent runs.
hypothesis link · human_seed link to H005 (seeded): Ryan: WTC 7 girder walk-off arithmetic and unreleased models.
David Chandler — WTC 7: A refutation of NIST's analysis (Toronto Report ch.9)
The 9/11 Toronto Report (2012), International Hearings on the Events of September 11, 2001 · 2012-09-11
Chandler's 2012 hearing paper treats NIST's own Stage 2 free-fall interval as established and argues the 5.4 s overall figure is an artefact of start-time choice.
hypothesis link · human_seed link to H005 (seeded): Same paper as a NIST-refutation.
Chandler, Walter, Szamboti — Instantaneous free fall of WTC 7 and NIST's attempt to hide it (Jun 2023)
Journal of 9/11 Studies · 2023-06-01
Using multi-point tracking, Chandler/Walter/Szamboti report that after ~1.4 s of near-immobility of most of the north and west rooflines, those rooflines entered free fall together within ~0.2 s at ~8.0–8.2 s after east-penthouse collapse, ~9.8 m/s² for ~2.5 s.
hypothesis link · human_seed link to H005 (seeded): Authors say the motion is inconsistent with NIST global-collapse analyses.
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.
claim stance · Inherited from matching claim CLM-013.
FDNY oral histories: multiple firefighters report explosions
New York Fire Department oral histories (released 2005 after lawsuit) · 2005-08-12
Multiple trained first responders independently described explosion-like events at the WTC site on 11 September 2001.
claim stance · Inherited from matching claim CLM-013.
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.
hypothesis link · human_seed link to H005 (seeded): Hulsey: fire did not produce the observed collapse.
AE911Truth petition: thousands of architecture and engineering signatories dissent from NIST
Architects & Engineers for 9/11 Truth (Richard Gage and associated filings) · 2019-01-01
A public petition of architects and engineers calls the official collapse explanations incomplete and asks for a new investigation.
hypothesis link · human_seed link to H005 (seeded): Same petition is organised opposition to fire-only.
Sources with no stance yet
289/11 Commission did not investigate WTC 7's collapse mechanism
9/11 Commission Report · 2004-07-22
The 9/11 Commission did not produce a collapse-mechanism finding for WTC 7.
hypothesis link · human_seed link to H005 (seeded): Commission silence on WTC7 mechanism is a scope gap, not a NIST finding.
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.
hypothesis link · human_seed link to H005 (seeded): NIST free-fall stage is compatible with its buckling model and with demolition arguments.
Eagar & 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.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
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.
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.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Commission: UA175 struck WTC2 at 09:03:11
9/11 Commission Report · 2004-07-22
A large aircraft identified as UA175 struck WTC 2 at 09:03:11, captured on live television.
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.
911DA email, 11 September 2001: WTC 'just being gone'
September 11 Digital Archive (RRCHNM / ASHP) · 2001-09-11
A 11 September 2001 email treats the World Trade Center as already gone while the writer listens to coverage.
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.