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Why ChatGPT keeps inventing case law — and how citation-grounded AI doesn't

A chatbot predicts fluent text; citation-grounded AI answers only from your record. The difference is the part lawyers care about.

The Christie team5 min read

A general chatbot invents case law because that is what it was built to do: predict fluent text. It is not consulting a library. Citation-grounded AI is a different architecture — and the difference is exactly the part lawyers care about.

Why fluency produces fabrication

Large language models generate the most probable next words. Asked for a supporting citation, the most probable output is something shaped like a citation — correct format, plausible parties — whether or not the case exists. Fluency and truth are not the same objective, and when they diverge, fluency wins.

Grounding, in practice

Citation-grounded systems retrieve the relevant passages from your matter first, then write an answer constrained to that retrieved evidence — and attach the source to every claim. If there is no supporting passage, there is no answer.

No source, no answer. The citation isn't decoration; it's the gate.

So a reference like § Ltr 03-14 is not generated text — it is a handle to a real document and page you can open in one click.

Christie cites every answer to your own files.

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What this changes for your workflow

You stop verifying whether the AI told the truth and start verifying the underlying source — the same thing you would check anyway. The tool does the retrieval; you keep the judgment. That is the only arrangement that belongs in a filing.

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