# Copyright, Licensing, and Text-Reuse Policy (`UnsolvedAstronomy`)

- **Metadata & Original Paraphrases**: Licensed under [Creative Commons Attribution 4.0 International (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/).
- **Source Rights Preservation**: Every source in `sources/registry.jsonl` and `source_registry.json` preserves its own copyright and license (`source_license`, `reuse_mode`).
- **Paraphrase Policy**: Records with `reuse_mode = "paraphrase_only"` or `"metadata_only"` withhold verbatim source quotes (`original_statement = ""` / `null`) and publish only original normalized formulations with full bibliographic citations and stable identifiers (`DOI`, `arXiv`, `ADS bibcode`).