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nexus/wiki/concepts/Source-Grounding.md
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---
title: "Source Grounding"
type: concept
tags: [ai, rag, hallucination-prevention]
---
## Definition
Source Grounding源 grounding是一种将 AI 回答严格锚定在用户提供的可信文档中的机制,确保回答仅基于给定材料,消除幻觉。
## Core Mechanism
NotebookLM 的知识库严格限制为用户上传的文档。AI 回答时:
1. 仅检索用户文档中的相关段落
2. 每个答案附带精确引文(指向原文)
3. 用户可点击引文跳转到原文确认
## Why It Matters
传统 LLMGPT-4、Claude 等依赖自身参数知识存在幻觉风险。Source Grounding 通过强制锚定到可信文档,将错误率降至最低。
## Relationship to RAG
RAGRetrieval-Augmented Generation也是一种 grounding 机制但通常在开放域中检索。Source Grounding 是更严格的版本——仅限用户明确提供的文档。
## Connections
- [[NotebookLM]] ← 典型实现
- [[RAG]] ← 上位概念
- [[引文追溯]] ← 机制保障