Meaning
When an LLM generates factually incorrect or fabricated information despite sounding plausible.
Definition
Hallucination in LLMs refers to the generation of outputs that, while often sounding plausible, are factually incorrect or entirely fabricated.
This phenomenon occurs because the model, while powerful, lacks true understanding and sometimes fills in gaps with misinformation or errors, leading to potentially misleading results.
Example
An LLM might confidently assert a false historical fact, such as stating that a famous figure was born in the wrong year, despite having no basis in reality.
