> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fallow.tools/llms.txt
> Use this file to discover all available pages before exploring further.

# Explanations

> Mental models for how Fallow works and how to use it well. Static vs runtime intelligence, Fallow vs linters, health, duplication, and dead code explained.

These pages explain the model behind the tool.

<CardGroup cols={2}>
  <Card title="Static vs runtime intelligence" icon="chart-network" href="/explanations/static-vs-runtime">
    Static answers "what is connected". Runtime answers "what actually ran".
  </Card>

  <Card title="Fallow vs linters" icon="scale-balanced" href="/explanations/fallow-vs-linters">
    Why project-wide analysis catches what file-local tools cannot.
  </Card>

  <Card title="Health explained" icon="heart-pulse" href="/explanations/health">
    How health, maintainability, and refactor targets are computed.
  </Card>

  <Card title="Duplication explained" icon="clone" href="/explanations/duplication">
    The four detection modes and when to use each.
  </Card>

  <Card title="Dead code explained" icon="skull-crossbones" href="/explanations/dead-code">
    What Fallow considers reachable and why.
  </Card>
</CardGroup>

If you are new to Fallow, start with **Static vs runtime intelligence** and **Fallow vs linters**.