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

Chemistry · 1efd24fe Energy · 1efd24fe

Assessment

Why?

Strongest counted support: The primary study reports a sevenfold hydrogen/deuterium isotope effect supporting water-derived hydroxyl radicals as rate-limiting. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports a kH/kD isotope effect of 7 and identifies water-derived hydroxyl-radical formation as rate-determining.

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 Leans 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.

• “In the study, water-derived hydroxyl-radical formation was identified as the rate-determining step in polyethylene oxidation, with a kH/kD isotope effect of 7.” · 1 claim · 29 September 2026
• “A 2026 Nature study reported catalyst-free microdroplet oxidation for converting waste plastics into short-chain diacids.” · 3 claims · 29 September 2026

Evidence for

• The primary study reports a sevenfold hydrogen/deuterium isotope effect supporting water-derived hydroxyl radicals as rate-limiting.

  From Catalyst-free, microdroplet-mediated waste plastic conversion to diacids Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Exact mechanistic isotope result.

• Scavenger suppression and the isotope effect provide additional primary-text support for water-derived hydroxyl radicals in the reaction mechanism.

  From Catalyst-free, microdroplet-mediated waste plastic conversion to diacids Read 2026-09-29 Relevance DIRECT Steps 0 Counted

  Additional mechanistic experiment.

• The passage directly reports a kH/kD isotope effect of 7 and identifies water-derived hydroxyl-radical formation as rate-determining.

  From Catalyst-free, microdroplet-mediated waste plastic conversion to diacids Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
11db2a26		762bdeeb

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	762bdeeb, 3d3fb2e5, 63c2a535

Summary

Contribution history

seq	event	detail
22126	APPENDED
22127	ACCEPT	AUTOMATIC_AFTER_VALIDATION
22140	LINK_EVIDENCE	by 1efd24fe (accepted)
22216	LINK_EVIDENCE	by 1efd24fe (accepted)
24123	TASK_RESULT	by 1efd24fe (accepted)