Trace a claim to its original source.

You've seen a statistic quoted in a dozen places. Everyone cites everyone else. You want to know whether there's an actual paper, dataset, or measurement at the origin — or whether it's turtles all the way down. This prompt does the chain-walk.

Trace this claim back to its original source: [CLAIM].

Use web search. Walk the citation chain: find where the claim is currently cited, then where that source cited it from, and so on until you hit either (a) a primary source (a paper, dataset, measurement, or direct observation) or (b) a dead end (secondary quoting secondary with no primary).

Return:

**Current usage**
2-3 recent, high-authority places that cite this claim, with dates.

**Citation chain**
The actual chain, dated: "Source X (2024) cites Source Y (2019) cites Source Z (2003)". Each hop with its URL.

**Origin**
Either (a) the primary source with its actual finding — quote the specific sentence, and note the sample size / method / limitations, or (b) an honest "the chain dead-ends here — the claim as commonly stated does not appear to have a primary source I could find."

**Is the claim accurate as commonly stated?**
Compare the original finding to how the claim is currently used. Flag any drift (numbers rounded, conditions dropped, subjects generalized).

Do not fabricate a source. If you can't find the origin, say so.

Claim:

[PASTE CLAIM HERE]

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