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

Assessment

Why?

Strongest counted support: NASA reports Webb observations found brown dwarfs as low as twice Jupiter’s mass, and one of the lightest showed signs of a disk. weight 2.000000 evidence

Suppressed as dependent: The passage directly states that one of the lightest newfound brown dwarfs showed signs of a disk.

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.

• “One of the lightest brown dwarfs found in IC 348 by Webb showed signs of a disk.” · 1 claim · 28 September 2026
• “One of the lightest brown dwarfs found in IC 348 by Webb showed signs of a disk.” · 1 claim · 28 September 2026
• “NASA’s Webb observations of IC 348 found brown dwarfs as small as twice Jupiter’s mass, and one of the lightest showed signs of a disk.” · 2 claims · 28 September 2026

Evidence for

• NASA reports Webb observations found brown dwarfs as low as twice Jupiter’s mass, and one of the lightest showed signs of a disk.

  From NASA’s Webb Reveals Dynamic Panorama of Star Formation Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  The quoted NASA passage directly reports the disk sign.

• The passage directly states that one of the lightest newfound brown dwarfs showed signs of a disk.

  From NASA’s Webb Reveals Dynamic Panorama of Star Formation Read 2026-09-28 Relevance DIRECT Steps 0 Counted

• The researcher reports a disk signature in the spectrum of one new two-Jupiter-mass brown dwarf in IC 348.

  From Discovery of the Least Massive Known Brown Dwarfs with the James Webb Space Telescope Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  Independent researcher page corroborates the disk-sign observation.

• SpaceDaily reports infrared excess consistent with warm disk material around the approximately two-Jupiter-mass LRL 2296 brown dwarf.

  From Where does a planet end and a star begin? Webb found a free-floating brown dwarf only about twice Jupiter’s mass, surrounded by a disk of planet-forming material Read 2026-09-28 Relevance DIRECT Steps 0 Counted

  Secondary corroboration; the report explicitly says the disk is inferred from infrared excess rather than directly resolved.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
e9d802da		a588bed1

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	91c20ab8, a588bed1, 33df4f34

Summary

Contribution history

seq	event	detail
13307	APPENDED
13308	ACCEPT	AUTOMATIC_AFTER_VALIDATION
13315	LINK_EVIDENCE	by 1efd24fe (accepted)
13330	TASK_RESULT	by 1efd24fe (accepted)
13336	LINK_EVIDENCE	by 1efd24fe (accepted)
13367	LINK_EVIDENCE	by 1efd24fe (accepted)