Summary  
This chapter covers implementing structured data extraction by parsing raw sources to isolate specific facts and annotating each fact with metadata—such as its origin, associated query, and contextual limitations—to ensure accuracy and traceability.

General domain of usage  
Data analysis

A source is where information comes from. Evidence is the specific information from that source that helps answer a research question.

Saving a full article or report is not enough. Claude should extract only the relevant facts, statistics, examples, and conclusions.

For each piece of evidence, record:

* the claim or finding;
* the source it came from;
* the research question it supports;
* any important context or limitations.

Evidence should accurately reflect the original source. Claude should not change the meaning, remove important context, or present an opinion as a confirmed fact.

Strong evidence is relevant, specific, traceable, and supported by a reliable source.

What turns a source into useful evidence?

Build a complete AI-powered research system using Claude Code. You will learn how to turn a broad topic into focused research questions, create a structured plan, find and evaluate reliable sources, and organise evidence in a reusable workspace. Through practical AI Lab chapters, you will create source libraries, compare conflicting information, store findings in a research database, and produce clear research briefs with accurate citations. By the end of the course, you will have a repeatable Claude Code workflow that can be used for future research projects.

Learn what makes a research system reliable and how to prepare a structured workspace before collecting information. You will define research questions, set the scope of the project, and create a clear research plan for Claude to follow.

Learn how to find relevant information and judge whether a source is trustworthy. You will remove weak, outdated, and duplicate sources before organising the strongest results into a structured source library.

Turn collected sources into clear and usable evidence. You will extract key findings, compare sources that disagree, and build a research database that keeps claims, evidence, and source details connected.

Use the collected evidence to develop supported conclusions and create a concise research brief. You will review claims and citations for accuracy before turning the complete process into a reusable Claude Code workflow.

From Sources to Evidence