# Scientific and technical limitations

1. **No truth inference:** link relation labels are user judgments. Mixed supportive and challenging links are not a formal contradiction test.
2. **No automatic evidence extraction:** bibliographic API records are not article texts. The user must supply checked excerpts and locators.
3. **No causal inference:** connecting indicators with hypotheses does not estimate a policy effect. No confounding controls or counterfactual assumptions are tested.
4. **No meta-analysis:** link counts cannot be pooled as effect sizes or votes across independent studies.
5. **No semantic DOI deduplication:** only exact normalized DOI matches are detected when imported.
6. **No persistent storage:** download JSON before closing the page. No cross-device sync.
7. **Small networks:** SVG display grows cluttered with very large graphs; restrict to concise research questions and export GraphML for dedicated network software.
8. **External integrations:** Crossref and World Bank request availability, errors and CORS depend on live network conditions. The app has no secret API key support.
9. **Synthetic data:** initial illustration contains entirely fictional research records; never describe them as published evidence.
10. **Publication reliability:** a locally passing test suite does not guarantee the same behavior on every browser or that all research conclusions are valid.