Said his father did not own an emerald mine.
Evidence chain
From statement to verdict.
- 01
Original statement
Said his father did not own an emerald mine.
May 6, 2023 · Factual Assertion
- 02
Measurable target
Present-tense or retrospective claim
Not applicable
- 03
Observed outcome
Walter Isaacson’s reporting supports the narrow ownership denial: Errol Musk did not own a formal mine, although he acquired a share of emerald output from informal operations.
Evaluated Jul 26, 2026
- 04
Verdict and score
True
100 of 100 points under the v5 rubric. Promise/forecast verdict: Every material term was met, including timing, scope, quantity, capability, price, and permanence. Factual verdict: The central factual proposition is supported by strong evidence.
Record details
How this row was evaluated.
- Subject category
- Personal & Legal
- Topic category
- Personal & Biographical
- Organization or context
- Public discourse
- Relationship to organization
- Public sphere
- Assertion mode
- Direct social-media statement
- Deadline result
- Not applicable
- Eventual outcome
- Not applicable
- Factual accuracy
- True
- Canonical classification
- True
- Score points
- 100 / 100
- Included in headline score
- Yes
- Research confidence
- Medium-High
- Credible-source contestation
- Yes
- Contestation resolution
- The narrow ownership denial is supported; the broader denial of any emerald operation is evaluated separately in PUBLIC-043.
- Correction status
- No public correction identified
- Deleted after challenge
- No
- Repeated after correction
- No
- Evidence-documented repetition count
- 1
- Sensitive-topic metadata
- Personal biography
Topic tags are descriptive metadata and do not independently determine the verdict or score.
Intent stays separate
Was intentional deception established?
No
- Detailed assessment
- Not established
- Intent evidence level
- 0 / 3
Intent is not assessed because the underlying claim is Pending or Unresolved. The evidence does not first establish a settled inaccurate outcome from which a state-of-mind inquiry could responsibly proceed.
“No” does not mean the statement was true. It means the cited evidence did not meet the higher standard needed to establish the speaker's state of mind.
Evidence strength
A disclosed measure of evidence quality—not a probability.
Component scores measure source quality, corroboration, and directness. Verdict confidence begins with that evidence strength and applies the deductions documented in the methodology.
Quality and directness of evidence that Musk made the statement.
Quality of evidence establishing the outcome.
Independent corroboration across sources and domains.
How directly the evidence resolves the proposition.
- Evidence sources
- 3
- Independent source domains
- 3
- Claim audit
- Complete
- Source audit
- Pass
Material contestation is documented and resolved or left Unresolved in the row.
Citations
Read the underlying sources.
Field-level evaluation audit
Every calculated output carries its own evidence basis.
Open any of the 12 audited outputs to see its calculated value, written basis, rule, and cited sources.
01Deadline resultNot applicable
Evidence basis
Compared the original target/timeframe (“Present-tense or retrospective claim”) with the documented outcome. Result: Not applicable. Evidence: Musk denies that his father owned an emerald mine; Walter Isaacson details complicate the emerald-mine narrative; Isaacson says Errol Musk never owned an emerald mine. URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Compare original target with documented timing.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
02Eventual outcomeNot applicable
Evidence basis
Classified the later real-world result independently from the headline verdict. Result: Not applicable. Documented outcome: Walter Isaacson’s reporting supports the narrow ownership denial: Errol Musk did not own a formal mine, although he acquired a share of emerald output from informal operations. Evidence: Musk denies that his father owned an emerald mine; Walter Isaacson details complicate the emerald-mine narrative; Isaacson says Errol Musk never owned an emerald mine. URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Classify the later real-world outcome separately from the headline verdict.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
03Factual accuracyTrue
Evidence basis
Compared the normalized proposition with the cited records. Result: True. Documented outcome: Walter Isaacson’s reporting supports the narrow ownership denial: Errol Musk did not own a formal mine, although he acquired a share of emerald output from informal operations. Evidence: Musk denies that his father owned an emerald mine; Walter Isaacson details complicate the emerald-mine narrative; Isaacson says Errol Musk never owned an emerald mine. URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Compare the normalized factual proposition with cited evidence.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
04Canonical verdictTrue
Evidence basis
Factual-claim rule: apply the published True, Mostly True, Misleading, Unsupported, False, or Unresolved definition. Applied result: True (True). Evidence finding: Walter Isaacson’s reporting supports the narrow ownership denial: Errol Musk did not own a formal mine, although he acquired a share of emerald output from informal operations. Evidence: Musk denies that his father owned an emerald mine; Walter Isaacson details complicate the emerald-mine narrative; Isaacson says Errol Musk never owned an emerald mine. URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Apply strict promise rule or published factual-claim classification.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
05Score points100
Evidence basis
Score assigned mechanically from verdict and claim type under strict-promise-v1.0: True = 100 points.
Calculation rule
Map verdict mechanically to points under the applicable rule.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
06Inclusion in the Trust ScoreYes
Evidence basis
Included because the claim has a resolved evidence-based verdict.
Calculation rule
Include only resolved evidence-based verdicts.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
07Research confidenceMedium-High
Evidence basis
Evidence strength 83/100 = statement 26/30 + outcome 34/40 + corroboration 15/15 + directness 8/15. Published deductions yield verdict confidence 80/100 (Medium-High).
Calculation rule
Calculate from evidence components and published deductions.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
08Credible-source contestationYes
Evidence basis
Credible-source contestation: Yes. Resolution: The narrow ownership denial is supported; the broader denial of any emerald operation is evaluated separately in PUBLIC-043. Evidence URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Record material credible-source disagreement separately from verdict.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
09Correction statusNo public correction identified
Evidence basis
Correction status is bounded to the cited record: No public correction identified. Evidence URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Bound correction finding to cited evidence.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
10Repetition after correctionNo
Evidence basis
Repeated after correction: No. Minimum documented repetition count: 1. Evidence URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Bound repetition finding to cited evidence.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
11Intentional-deception answerNo
Evidence basis
Intent is not assessed because the underlying claim is Pending or Unresolved. The evidence does not first establish a settled inaccurate outcome from which a state-of-mind inquiry could responsibly proceed.
Calculation rule
Require direct admission, adjudicated intent finding, or comparably conclusive state-of-mind evidence.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
12Strict promise resultNot applicable
Evidence basis
Factual-claim rule: apply the published True, Mostly True, Misleading, Unsupported, False, or Unresolved definition. Applied result: True (True). Evidence finding: Walter Isaacson’s reporting supports the narrow ownership denial: Errol Musk did not own a formal mine, although he acquired a share of emerald output from informal operations. Evidence: Musk denies that his father owned an emerald mine; Walter Isaacson details complicate the emerald-mine narrative; Isaacson says Errol Musk never owned an emerald mine. URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
Calculation rule
Pass only if every material promise or forecast term was met; otherwise Fail, Pending, Unresolved, or Not applicable.
- Evidence strength
- 83 / 100
- Verdict confidence
- 80 / 100 · Medium-High
- Audit status
- Complete
Audit trail
Selection and scoring notes.
- v5 classification rationale
- Factual-claim rule: apply the published True, Mostly True, Misleading, Unsupported, False, or Unresolved definition. Applied result: True (True). Evidence finding: Walter Isaacson’s reporting supports the narrow ownership denial: Errol Musk did not own a formal mine, although he acquired a share of emerald output from informal operations. Evidence: Musk denies that his father owned an emerald mine; Walter Isaacson details complicate the emerald-mine narrative; Isaacson says Errol Musk never owned an emerald mine. URLs: https://www.businesstoday.in/technology/news/story/amid-elon-musks-constant-denial-his-father-details-4-day-visit-to-emerald-mine-with-billionaire-son-380484-2023-05-08; https://www.washingtonpost.com/technology/2023/09/20/walter-isaacson-elon-musk-details/; https://www.businessinsider.com/elon-musk-father-errol-never-owned-emerald-mine-telling-truth-2023-9
- v4 → v5 source-package migration audit
- Reclassified. proposition: Denied that his father owned an emerald mine and suggested the alleged mine lacked objective evidence. -> Said his father did not own an emerald mine. verdict: Unresolved -> True display: Unresolved -> True score: -> 100 inclusion: No -> Yes
- Selection basis
- Material v3 expansion claim selected under published inclusion rules
- Source quality
- Major newspaper and reporting based on Walter Isaacson’s authorized biography; family accounts and terminology conflict V4 evidence metrics: statement 26/30; outcome 34/40; corroboration 15/15; directness 8/15.
- Methodology note
- V5 uses strict-promise-v1.0. Later delivery does not earn partial credit for a missed dated promise. Excluded from the v3 Trust Score as Unresolved: The narrow ownership denial is supported by the biography, while Musk’s earlier account and his father’s emerald-trading history complicate the broader impression that no emerald enterprise existed.