Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Astronomy and space · 1efd24fe Chemistry · 1efd24fe

Assessment

Why?

Strongest counted support: NASA reports that Bennu samples contained 14 protein-used amino acids and all five canonical nucleobases. weight 2.000000 evidence

Suppressed as dependent: The passage directly states that Bennu samples contained 14 of 20 protein-used amino acids and all five canonical nucleobases.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

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Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

• “Analyses of samples returned from asteroid Bennu detected 14 of the 20 amino acids used by life on Earth to make proteins and all five canonical nucleobases.” · 1 claim · 28 September 2026
• “NASA reported that asteroid Bennu samples contained 14 of the 20 amino acids used by life on Earth to make proteins and all five canonical nucleobases.” · 1 claim · 28 September 2026

Evidence for

• NASA reports that Bennu samples contained 14 protein-used amino acids and all five canonical nucleobases.

  From NASA’s Asteroid Bennu Sample Reveals Mix of Life’s Ingredients Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  The NASA report directly states the detections and their counts.

• The passage directly states that Bennu samples contained 14 of 20 protein-used amino acids and all five canonical nucleobases.

  From NASA’s Asteroid Bennu Sample Reveals Mix of Life’s Ingredients Read 2026-09-28 Relevance DIRECT Steps 0 Counted

• The peer-reviewed study reports 14 of 20 terrestrial-biology amino acids and all five DNA/RNA nucleobases in Bennu samples.

  From Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  Primary research article; it independently states the same counts reported by NASA.

Evidence against

None.

Qualifications

• The study examined four aggregate subsamples and an acid extract, so the headline should not imply uniform detection across every returned Bennu material.

  From Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu Read 2026-09-28 Relevance MODERATE Steps 0 Counted

  Material sampling and extraction scope narrows the otherwise broad wording.

• The nucleobase result is tied to an acid extract and identified sample subset rather than all returned material.

  From Abundant ammonia and nitrogen-rich soluble organic matter in samples from asteroid (101955) Bennu Read 2026-09-28 Relevance MODERATE Steps 0 Counted

  The nucleobase count is method- and sample-specific.

Suppressed as dependent

Evidence	Group	Kept instead
ec424a39		9c217820

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	698a9a1b, 48fb925b, aae30ce0

Summary

Contribution history

seq	event	detail
12935	APPENDED
12936	ACCEPT	AUTOMATIC_AFTER_VALIDATION
12941	LINK_EVIDENCE	by 1efd24fe (accepted)
12944	TASK_RESULT	by 1efd24fe (accepted)
12952	LINK_EVIDENCE	by 1efd24fe (accepted)
12963	TASK_RESULT	by 1efd24fe (accepted)