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

Environment · 1efd24fe Climate · 1efd24fe

Assessment

Why?

Strongest counted support: The source reports three- to 22-fold higher deposition during Helene and site-specific annual shares of 18.8%, 4.2%, and 4.6%. weight 2.000000 evidence

Suppressed as dependent: The packet directly reports a three- to 22-fold deposition spike and annual site shares of 18.8%, 4.2%, and 4.6%.

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 Unresolved.

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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.

• “Hurricane Helene produced a short-term spike in microplastic deposition at three Western North Carolina sites, accounting for 18.8%, 4.2%, and 4.6% of annual...” · 1 claim · 29 September 2026
• “Hurricane Helene produced a short-term spike in microplastic deposition at three Western North Carolina sites, accounting for 18.8%, 4.2%, and 4.6% of annual...” · 1 claim · 29 September 2026

Evidence for

• The source reports three- to 22-fold higher deposition during Helene and site-specific annual shares of 18.8%, 4.2%, and 4.6%.

  From Hurricane Helene Deposited Nearly One-Fifth of Annual Microplastics at One North Carolina Site Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The packet directly reports a three- to 22-fold deposition spike and annual site shares of 18.8%, 4.2%, and 4.6%.

  From Hurricane Helene Deposited Nearly One-Fifth of Annual Microplastics at One North Carolina Site Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• An independent Asheville study found microplastic fibers at three of four tributary sites in Hurricane Helene flood sediments.

  From Microplastics in flood sediments deposited by Hurricane Helene around Asheville, North Carolina Read 2026-09-29 Relevance CONTEXT_ONLY Steps 2 Counted

  Independent study of flood-sediment deposition supports the storm-related microplastic context but does not reproduce the Newswise study's three site-specific annual percentages.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
a7ea13d9		1dac430c

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	b9f12ec1

Summary

Contribution history

seq	event	detail
19881	APPENDED
19882	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19887	LINK_EVIDENCE	by 1efd24fe (accepted)
19901	TASK_RESULT	by 1efd24fe (accepted)
19979	LINK_EVIDENCE	by 1efd24fe (accepted)