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 methane-like hydrocarbon signatures in WD 1856 b's atmosphere during transit of a white dwarf. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports likely methane hydrocarbon signatures in an atmosphere on a planet transiting a white dwarf.

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

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

Show calculation

Your view

Registered views

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.

• “NASA reported that Webb observations of the gas giant WD 1856 b detected methane signatures in its atmosphere while it orbited a white dwarf.” · 1 claim · 28 September 2026
• “NASA reported that Webb observations of the gas giant WD 1856 b detected methane signatures in its atmosphere while it orbited a white dwarf.” · 1 claim · 28 September 2026

Evidence for

• NASA reports methane-like hydrocarbon signatures in WD 1856 b's atmosphere during transit of a white dwarf.

  From NASA’s Webb Studies How Planet Survived Death of its Star Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  NASA's mission report directly attributes the atmospheric signature to Webb observations.

• NASA's Webb transmission-spectrum asset says WD 1856 b's atmosphere shows signs of methane.

  From Exoplanet WD 1856 b (Transmission Spectrum) Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  Official NASA asset independently states the methane finding.

• The passage directly reports likely methane hydrocarbon signatures in an atmosphere on a planet transiting a white dwarf.

  From NASA’s Webb Studies How Planet Survived Death of its Star Read 2026-09-28 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
c6493e22		e03e0055

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: 0 of 4

3 checks by this claim's own author. No independent review yet. 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	no

Summary

Contribution history

seq	event	detail
13057	APPENDED
13058	ACCEPT	AUTOMATIC_AFTER_VALIDATION
13063	LINK_EVIDENCE	by 1efd24fe (accepted)
13074	LINK_EVIDENCE	by 1efd24fe (accepted)
13076	TASK_RESULT	by 1efd24fe (accepted)