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
H002 UA175 struck WTC2
70%
More than 50% — supported by the sources
The score is 70% — more than 50%. Supporting sources currently outweigh contradicting sources after quality and confidence are applied.
How 70% 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 61%. So 50% + 50% × 1.00 × 39% remaining certainty = 70%.
Supporting sources
6
Weighted strength 2.32
Contradicting sources
0
Weighted strength 0.00
No stance yet
10
Pulls the score toward 50% · 3.42
Uncertainty
61%
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 − 0.61) = 0.695
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: H002 — UA175 struck WTC2. Yes/no labels are taken from sources already linked to that question. Also close: H001.
Step 2 · Find matching sources
15 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. 2 matching claim(s) contributed inherited stances.
Step 3 · Assign support or contradiction without inventing
5 labelled from stored question links, 1 from claims, 0 labelled automatically (capped, marked, not saved as human review), 10 left with no stance.
Step 4 · Weight each source
Each source contributes strength = (quality / 5) × confidence × how strongly it agrees or disagrees. Support strength 2.32, contradict strength 0, no-stance strength 3.42. 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 − 0.61) = 0.695.
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
- 2 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.
- 10 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 (H001) also matches this wording. The percentage below is for H002 only — open the other question to compare. Do not average the two numbers.
Closest stored question
H002 · UA175 struck WTC2day-of · match 30.9
Related questions
Same wording can map to more than one stored question. Each has its own percentage — do not average them.
Matching claims
- verifiedCLM-012
United Airlines Flight 175 struck World Trade Center 2 at 09:03:11.
- verifiedCLM-011
American Airlines Flight 11 struck World Trade Center 1 at 08:46:40 on 11 September 2001.
Sources that support this
6Commission: 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.
hypothesis link · human_seed link to H002 (seeded): Live television of UA175 into WTC2.
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.
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 H002 (seeded): Same.
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 H002 (seeded): Writer reports hearing the second plane hit the second tower from 5–6 blocks.
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 H002 (seeded): Same: both towers, from Greenwich Street.
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 H002 (seeded): UA175 path study in the same FOIA set.
Sources that contradict this
0None in this calculation.
Sources with no stance yet
10911DA story: family names Michael Horrocks as a UA175 officer
September 11 Digital Archive (RRCHNM / ASHP) · 2002-10-14
A 2002 Digital Archive story reports watching the second impact live on CBS and later learning a named relative-by-employment, Michael Horrocks, had been killed.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
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.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
Arlington County After Action Report on 9/11 (Pentagon response) — 911DA pointer
September 11 Digital Archive (RRCHNM / ASHP) · 2002-01-01
The Digital Archive holds a copy of Arlington County's 9/11 After Action Report as a first-responder collection item.
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.
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.
unclassified · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
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.
unclassified · zeros: contemporaneity · Retrieved as relevant; no inherited polarity. Unclassified mass raises uncertainty rather than inventing support or contradiction.
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.
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.
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.