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Vocabulary

Understand the term. Connect the concept.

A practical dictionary of 512 AI, machine learning, mathematics, and programming terms from HerbDev’s AI Vocabulary app. Start with a definition, explore an example, then follow the concepts behind it.

Linked concepts open in a new tab. Audio reads the definition and example.

RAG

RAG / Retrieval · Level 2 of 5

RAG (RAG)

Generating output conditioned on information retrieved from an external collection.

Retrieval supplies context without necessarily changing the generator's parameters.

Example

An assistant retrieves manual passages before answering a product question.

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Audio transcript

RAG. Generating output conditioned on information retrieved from an external collection. Retrieval supplies context without necessarily changing the generator's parameters. For example: An assistant retrieves manual passages before answering a product question.

Explore this concept

A useful analogy

Looking up relevant pages before writing an answer.

Why it matters

This helps you trace an answer back to the evidence that was actually retrieved.

Technical detail

A retrieval stage selects evidence x for a generator modeling p(y | prompt, x). Errors can enter retrieval, assembly, or generation.

Common misconception

Retrieval does not itself fine-tune the generator or guarantee that every claim is supported.

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Related concepts

Quick recall question

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Put the terminology into context: How AI works · Machine-native representations · All learning paths

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