fabricate

Definition

To produce content with no basis in fact while presenting it as grounded — invented citations, invented numbers, invented events. It appears in critical framing rather than as a neutral technical term. Compared with hallucinate, which covers unintentional error broadly, fabricate emphasizes the act of manufacturing, and is typically used when the output is confidently specific.

Explainers using this term

• Paper Walkthrough: The Personalization Mirage — LLMs Invent a Version of You, and Their Self-Reports Point the Wrong WayThe Personalization Mirage: How LLMs Fabricate User Profiles, and Why Self-Monitoring Misleads