Claim

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.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 12935

27 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluable

Referenced 106 times: checked 2, looked up by assistants 0, viewed 70, shared 34. A count of attention, not evidence.

Topics

Astronomy and space · 1efd24fe Chemistry · 1efd24fe

Assessment

Supported

Score: 0.9781 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

2 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:5692ba5b-c053-8fd1-98b9-e7b7b8b10967

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from nasa.gov was not found on the page when Galedra fetched it.

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.

Hide calculation

0.9781 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability HIGH · 5 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:bffd4c2f1ddd95cd6e12aabd4369ba065af25c1dd0a5dff37abadd4fef500cec

Last changed at entry seq 12975; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
1c560f42 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 9c217820)
698a9a1b qualify	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.540000	0.000000 (non directional)
48fb925b support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
aae30ce0 qualify	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.540000	0.000000 (non directional)
9c217820 support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000

prior 0.50 → log-odds 0.000000 + 3.800000 (the counted weights) = 3.800000 → probability 0.9781

Under neighbouring settings of the same model: 0.9346 to 0.9929, a spread of 0.0583.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

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

Supported. The main support is: The peer-reviewed study reports 14 of 20 terrestrial-biology amino acids and all five DNA/RNA nucleobases in Bennu samples. 9988ca95

1 further item repeats the same origin and is not independent evidence. ec424a39

Qualifier: The study examined four aggregate subsamples and an acid extract, so the headline should not imply uniform detection across every returned Bennu material. d0d4d07f

Qualifier: The nucleobase result is tied to an acid extract and identified sample subset rather than all returned material. b37e1398

A search for evidence in the opposing direction found none. 55fcfcc8

Review checks: 1 of 4. coverage:5692ba5b-c053-8fd1-98b9-e7b7b8b10967

Generated by stub-v0.1; every sentence cites graph ids.

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)

Score trace

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