2>REMEMBER THE FACTS: CACHE!</h2>

          <ul>
            <li>Persist facts and inventories instead of fetching them on each play</li>
            <li>Improve performance</li>
          </ul>
          <aside class="notes">
            <li>Useful with huge number of hosts</li>
            <li>Redis</li>
          </aside>
        </section>

        <section>
          <h2>INTERPRET INFORMATION: TEST!</h2>

          <ul>
            <li>Extend tests and checks (like `when`)</li>
            <li>Check c