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Claim map

Follow one claim across every paper and page that makes it.

The same statistic often travels from one study through reviews, news and explainers, changing a little each time. A claim map shows where it started, every place that repeats it, which versions drifted, and what the evidence says now.

Explore a claimSearch claims
ClaimTraced across 38 sources“Sea level is rising by 3.7 mm a year”
Origin2006–2018 averageIPCC AR6 WG1, ch. 9 (2021)
Repeated correctly24 pages · 9 papers
Drifted: stated as “3.2 mm”3 corrected since July4 pages
Drifted: no period givenCorrection proposed1 page
Every drifted copy can receive a correction in one step
How it works

From one source to everywhere it travelled

1Start from a claimSearch a sentence or a number, or open one from any page record.
2See its originThe earliest source and its exact wording.
3See every copyPages and papers that repeat it, grouped by whether they match.
4Fix the driftPropose a correction to every copy that changed it, at once.
Claims being traced

Numbers that travel

Claim38 sources · 5 drifted“Sea level is rising by 3.7 mm a year”Origin: IPCC AR6 WG1 (2021)
3 corrections accepted
Claim61 sources · 12 drifted“Most people start metformin at 500 mg”Origin: NICE NG28 (2022)
7 corrections accepted
Claim19 sources · 9 drifted“The Arctic will be ice-free by 2035”Origin: unclear: earliest is a 2019 news article
Open problem in c/oceanography
Claim14 sources · 2 drifted“Carbon prices add 4% to household energy bills”Origin: Ikeda (2026), SSRN
Under review

Listings are illustrative.