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Wednesday, May 20, 2026

Generative AI hallucinations for attorneys: Separating facts from ... - Thomson Reuters

Generative AI is one of the biggest talking points today. It promises to transform how work is done across multiple sectors, and legal work is a particularly rich area of opportunity.

Many firms and legal departments are already switched on to Generative AI, and there is no avoiding it. We spoke to Zach Warren from the Thomson Reuters Institute about the potential and pitfalls of the technology, and to separate fact from fiction – including a question about notorious generative AI ‘hallucinations’.

Zach Warren leads technology and innovation content for the Thomson Reuters Institute. Zach has been writing and speaking on tech and innovation for more than a decade, and with Thomson Reuters, charts the future of professional services industries, including legal, tax, and risk & fraud, through writing, podcasts, speaking engagements, and more. Zach was also the lead author of TRI’s Generative AI in the Law Firm Report, among other technology-centric reports. Before coming to Thomson Reuters, Zach was the editor-in-chief of ALM’s Legaltech News and featured on Law.com, The American Lawyer and ALM events such as Legalweek.

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How has Generative AI landed in legal so far?

Who should be overseeing the adoption of Generative AI?

Can you describe some of the impacts it will have on legal practice?

How does the cost of implementing generative AI in law firms compare to other technology investments commonly made in the legal industry?

Will things...



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