AI Hallucination

What does it mean in everyday language?

An AI system can produce a plausible answer that includes invented facts or references. Confident wording is not evidence that the answer was checked.

An example

Hypothetical example: a chatbot supplies a convincing quotation and a book page number, but checking the book shows that the quotation is absent.

A more precise definition

AI hallucination is a common term for generated content that is factually incorrect or unsupported by the relevant evidence or input. NIST uses confabulation for confidently presented erroneous or false content.

Key features

• Concerns the content of a generated output
• Can include fabricated citations or details
• May require source checks to detect

Where the definition stops

The term does not imply a human perceptual experience or deliberate lying. Requested fiction is also different from an invented claim presented as fact.

How it relates to synthetic imprinting

An unsupported output could become information that someone later remembers or relies on. Whether that produces lasting change is a separate empirical question.

Research context

NIST's Generative AI Profile identifies confabulation as a risk. Definitions and evaluation methods differ, so a study should specify whether it tests factual accuracy, support from sources, or consistency with supplied material.

Related terms

• Generative AI Established Concept
• Misinformation Established Concept
• Automation Bias Established Concept

Sources and further reading

1. Artificial Intelligence Risk Management Framework: Generative Artificial Intelligence Profile — National Institute of Standards and Technology (2024). NIST AI 600-1.

Cite this definition

What the status means

First published

2026-09-24

Updated

2026-09-24

Version

1.0

Prepared by

SyntheticImprinting.com Editorial Project

Review status

External expert review pending

Page address

https://syntheticimprinting.com/terms/ai-hallucination/

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