H013
UA93 was shot down rather than crashed solely by a passenger revolt
Competing with the Commission CVR narrative. Nearby military aircraft, debris scatter, and shoot-down-order chronology are the inputs. Official transcription of the CVR is the principal contradict.
Likelihood — more or less than 50%
28%
Less than 50% — contradicted by the sources
Start at 50%. Move by half of the net source score after uncertainty. Net source score is -0.66 (from −1 contradict to +1 support). Uncertainty is 34%. So 50% + 50% × -0.66 × 66% remaining certainty = 28%.
0.5 + 0.5 × -0.66 × (1 − 0.34) = 0.282
Recalculate with sourcesAdversarial challenge
- Contradicting objects: 3
- Supporting objects: 2
- Distinct source classes: 5
- Objects with a zero quality dimension: 1
Version history
v1 · 2004-07-22 · conf 0.18 · unc 0.45
CVR-as-released favours passenger revolt; debris and nearby military aircraft leave a residual question.
supports1
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.
human_seed · seeded · Griffin ch.7 UA93 shoot-down strand (Nash, debris, phones).
weakly supports1
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.
human_seed · seeded · Nearby military aircraft and distributed debris.
neutral1
911DA email, 11 September 2001: 'a plane crashed outside PIT!'
September 11 Digital Archive (RRCHNM / ASHP) · 2001-09-11
A 11 September 2001 email in the Digital Archive consists of the sentence 'a plane crashed outside PIT!'
human_seed · seeded · Same-day 'plane crashed outside PIT' is crash-language, not a mechanism.
indeterminate2
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.
human_seed · seeded · UA93 audio addendum not yet read.
Mineta: Cheney asked if 'the orders still stand' as an aircraft approached
Norman Mineta testimony, 9/11 Commission hearing, 23 May 2003 · 2003-05-23
Norman Mineta testified that Cheney confirmed standing orders while being updated on an inbound aircraft's decreasing range.
human_seed · seeded · Shoot-down orders were discussed that morning; link to UA93 not shown.
contradicts3
Commission: UA93 crashed near Shanksville at 10:03:11 after a passenger revolt
9/11 Commission Report · 2004-07-22
UA93 impacted a field in Somerset County, Pennsylvania, at 10:03:11. Official transcription of the CVR describes a passenger counterattack.
human_seed · seeded · Commission/CVR passenger-revolt finding.
UA93 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.
human_seed · seeded · 09:23 warning then 09:28 hijack mayday is the passenger-revolt sequence, not a shoot-down order.
Human review can dispute any AI or seeded link. Seeded links are labelled and are not silent overwrites.
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