Async Governance GlossaryDefinition

What Is AI hallucination?

Last updated: April 2026

Definition

An AI hallucination is a confident, fluent, plausible-sounding answer from an AI system that is factually wrong. The system does not signal uncertainty; the output looks indistinguishable from a correct answer.

Hallucination is a structural property of how language models work — they generate the most likely continuation of a prompt, not the truest one. Truth and likelihood are correlated but not identical, and the gap is where hallucinations live.

For organizational use of AI, hallucination is the central reliability problem. The fix is not at the model layer — it is in the surrounding architecture: grounding answers in retrieved sources, requiring citations, and accepting refusals when the system cannot answer reliably.

Why AI hallucination Matters for Distributed Teams

Every organizational AI deployment that takes itself seriously has to grapple with hallucination. The systems that pretend it does not exist eventually surface it the hard way.

The most honest AI products are the ones that refuse when grounding is absent. The least honest are the ones that generate confident answers from nothing.

Frequently Asked Questions

What is an AI hallucination?

An AI hallucination is a confident, fluent, plausible-sounding answer from an AI system that is factually wrong. It is a structural property of language models, which generate likely continuations rather than verified truths. The fix is in the surrounding architecture — grounding, citations, and accepted refusals.

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