Why Avoid Generative Legal AI Systems? Hallucination, Overreliance, and their Impact on Explainability

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1. Verfasser: Varkonyi, Gizem Gültekin
Format: Preprint
Veröffentlicht: 2026
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author Varkonyi, Gizem Gültekin
author_facet Varkonyi, Gizem Gültekin
contents This article argues that the deployment of generative AI systems in legal profession requires strong restraint due to the critical risks of hallucination and overreliance. Central to this analysis is the definition of Generative Legal AI (GLAI), an umbrella term for systems specifically adapted for the legal domain which is ranging from document drafting to decision support in criminal justice. Unlike traditional AI, GLAI models are built on architectures designed for statistical token prediction rather than legal reasoning, often leading to confabulations where the system prioritizes linguistic fluency over factual accuracy. These hallucinations obscure the reasoning process, while the persuasive, human-like nature of the output encourages professional overreliance. The paper situates these dynamics within the framework of European AI governance, arguing that the interaction between fabricated data and automation bias fundamentally weakens the principle of explainability. The article concludes that without effective mechanisms for meaningful human scrutiny, the routine adoption of GLAI poses significant challenges to judicial independence and the protection of fundamental rights.
format Preprint
id arxiv_https___arxiv_org_abs_2603_15937
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Why Avoid Generative Legal AI Systems? Hallucination, Overreliance, and their Impact on Explainability
Varkonyi, Gizem Gültekin
Human-Computer Interaction
Computers and Society
This article argues that the deployment of generative AI systems in legal profession requires strong restraint due to the critical risks of hallucination and overreliance. Central to this analysis is the definition of Generative Legal AI (GLAI), an umbrella term for systems specifically adapted for the legal domain which is ranging from document drafting to decision support in criminal justice. Unlike traditional AI, GLAI models are built on architectures designed for statistical token prediction rather than legal reasoning, often leading to confabulations where the system prioritizes linguistic fluency over factual accuracy. These hallucinations obscure the reasoning process, while the persuasive, human-like nature of the output encourages professional overreliance. The paper situates these dynamics within the framework of European AI governance, arguing that the interaction between fabricated data and automation bias fundamentally weakens the principle of explainability. The article concludes that without effective mechanisms for meaningful human scrutiny, the routine adoption of GLAI poses significant challenges to judicial independence and the protection of fundamental rights.
title Why Avoid Generative Legal AI Systems? Hallucination, Overreliance, and their Impact on Explainability
topic Human-Computer Interaction
Computers and Society
url https://arxiv.org/abs/2603.15937