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Core concept · AI Search Infrastructure

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Definition

Post-hoc citation is the behavior, documented for ChatGPT, where the model selects its answer from parametric knowledge first and then retrieves URLs to support a decision already made. The citations are justification, not the source of the answer. Post-hoc citation means that for queries where the model has a high-confidence parametric answer, retrieval optimization affects which URLs appear in citations — not what the model says. The answer was already determined. This is why content optimization alone cannot override wrong parametric representations for established brands, and why being well-indexed is not the same as being able to change the answer.

Parametric inertia

Parametric knowledge

Retrieval trigger

Knowledge conflict

Training corpus

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