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Large Language ModelsAI Safety & AlignmentGIGAZINE AIPublished: Nov 14, 2026, 10:00 JST

"Intelligent and likable": Fluent but wrong AI fools users, study finds

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"Intelligent and likable": Fluent but wrong AI fools users, study finds

3 Key Points

  1. What happened

    In the study, subjects gave the highest ratings to an AI that answered correctly in polished language — but a fluent AI that was subtly wrong was rated just as 'intelligent and likable', and most failed to spot its misinformation.

  2. Why it matters

    Fluency alone seems to trigger a sense of intelligence, making people unconsciously assume there is no need to double-check what the AI says, according to the researchers.

WHO IT HITSThis lands on anyone who uses chatbots for quick answers — students, office workers, and researchers — who may trust fluent but inaccurate output without verifying it.

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Context & Analysis

The study, described by co-author and associate professor Barbara Müller, suggests that when text is polished and natural-sounding, people automatically perceive intelligence and unconsciously stop checking for errors. Co-author and professor Tibor Bosse adds that large language models are trained to produce statistically plausible, readable text — not necessarily truth — and while most chatbots display a general disclaimer that outputs may be inaccurate, they rarely express uncertainty for each answer.

Bosse argues that if companies were required to have AI state its own doubt, that could help prevent people from accepting falsehoods as fact. The findings point to a gap between how convincing an AI sounds and how correct it actually is.

FAQ
What did the study find about how people rate AI?
Subjects rated an AI that answered correctly in polished language highest, but a fluent AI that was subtly wrong was rated just as 'intelligent and likable' as the correct one.
What do the researchers recommend?
Co-author Tibor Bosse says tech companies should be required to make AI show its uncertainty, so people do not mistake falsehoods for truth.
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