> ## Documentation Index > Fetch the complete documentation index at: https://polymarketus.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Resolution Sources > Learn how rule-defined sources determine market resolution Markets resolve using the **specific sources listed in the rules**. These sources provide the authoritative outcome. Unlisted sources have no effect on market resolution. *** ## Types of Resolution Sources Resolution sources fall into three main categories. Each category has clear standards for what counts as official. ### Government Government providers supply final, authoritative data for political, economic, and administrative outcomes. Weather page showing official government data **Examples** * Congress * Bureau of Labor Statistics * National Weather Service ### Sports Sports markets resolve using results published by the governing league or competition organizer. Football game page displaying final score **Examples** * Professional football leagues * Professional basketball leagues * Professional baseball leagues ### News Some markets use news outlets as resolution sources. When the rules list specific outlets, resolution comes from **those exact outlets**. Some markets rely on a single outlet, while others require **agreement** between several named outlets. News article headline page **Examples** * Major news outlets * Wire services * National newsrooms *** ## Key Points * The **rule-defined source** controls market resolution * **Unlisted sources** have no effect on resolution * **Some markets require agreement** from multiple sources * Always read the full rules to confirm both the **qualifying event** and the **source requirements**