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 Physics · 1efd24fe

Assessment

Why?

Strongest counted support: UBC’s report describes CHIME’s standalone hydrogen detection, approximate epoch, neutral fraction, and 94-night 2019 dataset. weight 1.800000 evidence

Strongest counted contradiction: Independent coverage dates the CHIME signal to seven to nine billion years ago, conflicting with a literal roughly five-billion-years-ago timing. weight 0.540000 evidence

Suppressed as dependent: The passage directly reports CHIME’s standalone detection, approximate epoch, neutral fraction, and 94-night 2019 observations.

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 Leans supported to Leans contradicted.

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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.

• “UBC reported that CHIME made a standalone detection of neutral-hydrogen emission from roughly five billion years ago using 94 nights of 2019 observations,...” · 1 claim · 29 September 2026

Evidence for

• UBC’s report describes CHIME’s standalone hydrogen detection, approximate epoch, neutral fraction, and 94-night 2019 dataset.

  From Canadian telescope directly maps earliest glow of hydrogen, opening a new window on the universe Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The passage directly reports CHIME’s standalone detection, approximate epoch, neutral fraction, and 94-night 2019 observations.

  From Canadian telescope directly maps earliest glow of hydrogen, opening a new window on the universe Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

• Independent coverage dates the CHIME signal to seven to nine billion years ago, conflicting with a literal roughly five-billion-years-ago timing.

  From Indian scientists spot hydrogen from 8 billion years ago. It could help decode dark energy Read 2026-09-29 Relevance MODERATE Steps 0 Counted

Qualifications

• The result demonstrates a detection capability that enables future expansion studies, rather than measuring cosmic expansion itself.

  From Canadian telescope directly maps earliest glow of hydrogen, opening a new window on the universe Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  The claim’s “potential independent route” wording is appropriate, but the result should not be read as a completed expansion measurement.

Suppressed as dependent

Evidence	Group	Kept instead
12f6ed01		e17adf4c

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
18950	APPENDED
18951	ACCEPT	AUTOMATIC_AFTER_VALIDATION
18956	LINK_EVIDENCE	by 1efd24fe (accepted)
18958	TASK_RESULT	by 1efd24fe (accepted)
25055	TASK_RESULT	by 1efd24fe (accepted)
25857	TASK_RESULT	by 1efd24fe (accepted)