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Why AI "hallucinates" (and how to prevent it)

The article highlights the risks associated with the use of AI in the legal field, particularly the phenomenon of "hallucination" where AI generates false but credible information. It proposes a four-step method for using AI safely, emphasizing the importance of source verification and the integration of reliable legal analysis tools. Finally, it underscores that firms can gain efficiency while maintaining the necessary rigor through appropriate practices.

Author
Tomorrow Solutions
Published
August 12, 2025
Reading
4 min
Why AI "hallucinates" (and how to prevent it)

Did you know that an American lawyer was sanctioned for citing a case law... invented by ChatGPT? This is not an isolated incident. The rise of AI in legal tech brings unprecedented opportunities, but also very real risks if one does not know how to use it.

Legal artificial intelligence models are probabilistic text generators: they do not "understand," they group words that "statistically" go together. The result: they can produce credible... but false passages. And in the legal field, a false source can be very costly — in reputation as well as liability.

What You Will Discover

  • The secret that 90% of firms ignore: why generative AI is not a database... and what that changes
  • The 4-step method to use AI without hallucinations (and without sanctions)
  • Why your competitors are already getting ahead: how they secure the use of AI to produce more, faster... without compromising their rigor

When AI Invents: A Real Issue

The Mata v. Avianca case in 2023 marked a turning point: a New York lawyer cited six non-existent case laws provided by AI. The outcome: a reprimand from the court and lasting damage to his credibility.

This reveals a fundamental truth: generative AIs do not know what they are saying. They "hallucinate" by generating plausible text without verifying sources.

And yet, the use of legal automation is exploding: drafting conclusions, contract analysis, legal research... The time savings are real, if (and only if) you put safeguards in place.


Save Time Without Risking Errors: Effectively Verify What AI Says

"We now use AI to generate summary notes, but every reference is automatically cross-checked with our own legal database. Result: 3 hours saved per week, with no errors detected to date."
— Legal Director, construction group (20 in-house lawyers)

With augmented legal analysis tools, you can:

  • Reduce research time by 40% with AI coupled with a reliable database
  • Decrease document review costs by 20% by automating sorting and structuring
  • Enhance your rigor by integrating automatic checks (reverse prompt, source cross-checking)

The key? Never blindly trust a language model, no matter how fluent it is.


Avoid Hallucinations: The 4-Step Method for Secure AI Use

Here is our simple protocol to limit risks in your firm:

  1. Clearly explain your expectations in the prompt (specify the type of source expected)
  2. Use reframing prompts: “What is the reference for this decision?” or “Give me the excerpt of the applicable law”
  3. Systematically verify citations via a certified legal search engine
  4. Pair your AI with reliable internal or partner databases (e.g., doctrine, Lamyline, internal case law)

Tip: reverse prompting allows you to test the coherence of a response by rephrasing the question in reverse.


How to Reliably Integrate AI into Your Practice

You can quickly secure the use of legal AI solutions:

  • Train your team on the right AI reflexes from the start
  • Connect your generative AI tool to validated legal data
  • Follow an ethical and quality AI charter: this reassures your clients and protects your team

At AI Tomorrow Solutions, we support firms and legal departments in deploying robust legal artificial intelligence solutions:

  • Intelligent legal research
  • Generation of verified contractual documents
  • Analysis and comparison of sensitive clauses
  • Prediction of case law with source justification

We combine AI and legal rigor; there is no question of sacrificing quality for speed.


In Summary

  1. AI can hallucinate, but your firm cannot: put the right safeguards in place
  2. Save time without losing reliability with integrated verification tools
  3. Your competitive advantage? An augmented, safe, and efficient practice

Ready to Transform Your Practice?

Book a 30-minute free consultation to discover how to secure the use of AI in your firm and automate your tasks without compromising on quality.

👉 Schedule your free consultation today
And let's move forward together towards a truly augmented firm.

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