# proof42.com

> Verify AI outputs before trusting them. Learn source checking, fact verification methods, and claim-level validation protocols for language models.

This site provides methods to verify language model claims and check sources. Research shows ungrounded models fabricate data while search-grounded answers match official documents.

## Author

- Zoltán Varga — AI visibility researcher and AI ecosystem architect, Budapest: https://vargazoltan.ai/
- English profile: https://zoltanvarga.ai/en/about/
- ORCID: https://orcid.org/0009-0003-1020-834X
- arXiv author: https://arxiv.org/a/varga_z_1.html
- Zenodo: https://zenodo.org/search?q=owners%3A1653886

## Publications

- Per-Entity Bias Mapping for AI Visibility: Why Brand Mentions Require Entity-Specific Calibration (arXiv:2606.21595): https://arxiv.org/abs/2606.21595
- AI Visibility in the Generative Era: A Manifesto for Entity-Level Measurement (DOI 10.5281/zenodo.20285424): https://doi.org/10.5281/zenodo.20285424
- Quality Challenges Do Not Escalate Source Fabrication in Large Language Models (RICE-P1) (DOI 10.5281/zenodo.20474050): https://doi.org/10.5281/zenodo.20474050
- Rejection-Induced Confabulation Escalation — Pilot Study 2 (RICE-P2) (DOI 10.5281/zenodo.20509755): https://doi.org/10.5281/zenodo.20509755

## Key topics

- AI output verification
- fact checking AI
- verify language model claims
- source verification methods
- AI hallucination detection
- search grounded AI
- claim validation protocol
- AI truthfulness
- LLM fact checking
- AI verification tools
- AI source checking
- AI hallucination rate
- AI output accuracy
- AI verification research
- AI fact verification
- AI source validation
- AI verifikáció
- AI tényellenőrzés
- nyelvi modellek ellenőrzése
- AI forrásellenőrzés

## Questions and answers

### How often do AI models fabricate sources?

Research indicates that 45.9% of sources in AI outputs are fabricated overall. In specific comparisons, ChatGPT showed a fabricated-source rate 9.2 times higher than Perplexity.

### Why is search grounding important for AI answers?

Without search grounding, models provide confident but incorrect product doses. Search-grounded answers align directly with official authorization documents.

### Can AI systems be tricked into citing fake concepts?

Yes, studies show that a few dollars of public posts can feed AI-search sources. Within a week, eight of ten systems cited a made-up concept.

### What methods does Zoltán Varga use for verification?

His research practice employs claim-level verification, source checking, and rival hypotheses. These methods are demonstrated through the brand-hallucination validation protocol.

### Is there training available for AI verification?

Training on AI output verification methods is currently in preparation. The site will eventually cover how to check what language models claim.

### Do AI models give accurate medical or dosage advice?

Unverified models often give wrong product doses when lacking search grounding. Accurate information requires matching official authorization documents through grounded retrieval.

## Related

- Research: https://vargazoltan.ai/kutatas/
- About: https://vargazoltan.ai/en/about/
- Contact: https://vargazoltan.ai/kapcsolat/