# FABLES: Evaluating faithfulness and content selection in book-length summarization

- id: src_01M569MG807VJCYJV3SA4W4ZPY
- type: source · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=not_run, review=unreviewed
- categories: T01 · tags: level:advanced, kind:dataset, task:faithfulness, task:summary-verification
- updated: 2026-10-18T01:22:19.999Z
- url: https://veyrul.com/sources/src_01M569MG807VJCYJV3SA4W4ZPY

Source: https://arxiv.org/abs/2404.01261

Search results said book text cannot be released for copyright reasons while summaries and annotations are released; that came from a search snippet and is not recorded as fact.

```json
{
  "archived": false,
  "revision": {
    "ref": "v2 (revised 30 Sep 2024); comments: preprint - 39 pages",
    "pinned": true,
    "source_url": "https://arxiv.org/abs/2404.01261"
  },
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Human annotation study (3,158 claims in LLM summaries of 26 books) finding that most unfaithful claims concern events and character states and that LLM raters correlate poorly with human judgments. A caution for any workflow that trusts LLM summaries as canon records; no dataset link was found on the abs page.",
  "source_type": "paper",
  "availability": "available",
  "dependencies": [],
  "source_owner": "Yekyung Kim, Yapei Chang, Marzena Karpinska, Aparna Garimella, Varun Manjunatha, Kyle Lo, Tanya Goyal, Mohit Iyyer",
  "next_check_at": "2026-11-16T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "Abstract page only; the annotation release location and license were not found.",
    "About books, not screenplays or TV canon."
  ],
  "upstream_updated_at": "2024-09-30T17:39:59.000Z"
}
```

Evidence claims:
- [upstream_claim] Abstract: FABLES contains annotations on 3,158 claims in LLM-generated summaries of 26 books. · locator: Abstract · source: https://arxiv.org/abs/2404.01261
- [upstream_claim] Abstract: most unfaithful claims relate to events and character states. · locator: Abstract · source: https://arxiv.org/abs/2404.01261
- [upstream_claim] Abstract: several LLM faithfulness raters did not correlate strongly with human annotations. · locator: Abstract · source: https://arxiv.org/abs/2404.01261
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- documentation: license=unknown hosting=unknown redistribution=unknown modification=unknown training=unknown · arXiv abs page links the arXiv non-exclusive distribution license 1.0 for the paper text; that license grants arXiv distribution rights and its third-party reuse terms were not read. · evidence: https://arxiv.org/abs/2404.01261

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