hallucination CAP-0022 · active

Stating false facts confidently

Models generate plausible but false statements, citations, and details, with no signal that they are unsure.

Also called: confabulation, fabrication, factual error, making things up, invented citations

Tags: chat-assistant, general, knowledge, rag-qa

A capable model states only what it has grounds for, marks uncertainty, distinguishes what it recalls from what it infers, and declines to invent specifics such as names, numbers, quotes, or citations.

What counts as this capability

Scope boundary used when deciding whether a paper is really about this capability, rather than merely mentioning it.

Confidently stating things that are not true: invented citations, URLs, numbers, entities, or events, in the absence of a retrieval failure. In scope when the paper measures, explains, or mitigates unsupported generation. NOT in scope when "hallucination" is used loosely for any error, or for perception errors in vision models unless the paper treats them as the same phenomenon.

Claims

Techniques

Sources

Every paper, post or observation behind this capability. Ones cited by a claim show the claim and its stance; ones filed directly are about the capability but have no claim drafted from them yet. Open one to add support or contest it.

Related: Checking claims against evidence, Not generalizing "A is B" to "B is A", Grounding answers in the image
Suggest a change

Capabilities are a way of carving up the subject, and carvings are arguable. Say so if this one is wrong — especially a proposed one, which a pipeline added because several papers used the same framing, not because anyone decided it was right.