BACK TO CODEXLegal AI Architecture
LLM Legal Hallucination
The phenomenon where an AI generates entirely fictitious legal citations, statutes, or case law.
In the legal field, a hallucination is not just an error; it is a sanctionable offense. Early generative AI tools were notorious for inventing fake case law (e.g., Mata v. Avianca). Vigil eliminates legal hallucinations through a strict Retrieval-Augmented Generation (RAG) architecture. A Vigil agent is mathematically restricted from citing a case unless it can retrieve the full text of that case from a verified, immutable legal database (like LexisNexis or Westlaw) and anchor its reasoning directly to the verified text.