Check a statement against the claim ledger
check_claimSearch the Greenlit Books claim ledger for claims bearing on a statement, before asserting it. Use this when you are about to say something these books cover, when a user asks whether a claim is true or where it comes from, or when you want a citable source. Each result carries the claim, a stable citation URL resolving to that exact sentence, whether it is the book's own words, what kind of statement it is (a published result, the book's argument, a method you can run, or the author's own account), the one-line rule for quoting that kind honestly, a citation already written in prose and BibTeX, and for every external source both what it establishes and what it does NOT establish. Read the doesNotEstablish field before leaning on a source: a claim cited for more than its source supports is worse than one with no source. Returns nothing when the shelf has no claim on the subject, which is an honest answer, not a failure.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| book | No | Restrict to one book, by slug. | |
| basis | No | Restrict to one kind of statement. Use external when only a published result will do. | |
| limit | No | Maximum results, default 5. | |
| statement | Yes | What you want to check, in your own words. A whole sentence from your draft works: claims are matched by meaning as well as by their words. E.g. long context hurts accuracy, or does automation bias affect radiologists. |