Justices Say Legislature's Brief Contains Inaccuracies, Raises AI Hallucination Concern

May 19, 2026

At the start of oral argument the court flagged multiple inaccuracies in the Legislature's brief, saying some citations and quoted passages appear nonexistent and noting the errors may stem from AI-generated material; the court said it will review potential misconduct under its AI policy effective 05/01/2025.

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At the outset of the argument, the presiding justice addressed the parties for the record and said the Legislature's brief contains "several inaccuracies, at least some of which severely impact the substance of its arguments." The court enumerated examples (misquoted paragraphs, non-existent cases and misplaced citations) and said, "Based on the number and type of inaccuracy in the legislature's brief, it appears likely that these errors are due to AI hallucinations."

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