> ## Documentation Index > Fetch the complete documentation index at: https://docs.clavata.ai/llms.txt > Use this file to discover all available pages before exploring further. # Rule Filtering > A guide to using Rule Filtering to isolate and analyze the impact of individual policy rules on your test data. Rule Filtering is a powerful tool for debugging and refining your policies. It allows you to trace a specific outcome in your test results directly back to the individual rule that caused it. By clicking on the filter button to the left of your rules within a label, you can instantly filter your test data to see only the rows that were affected by that specific assertion. This provides a granular view that is essential for understanding complex policy logic. ## Why Use Assertion Filtering? This feature is invaluable for several common tasks: * **Debugging Complex Policies:** When a label is applied, it can sometimes be difficult to know which of its many rules was the trigger. Assertion Filtering lets you pinpoint the exact rule responsible for a result. * **Validating New Rules:** After adding a new rule to a label, you can click on it to immediately see if it's capturing the correct data without affecting unintended rows. * **Refining Rule Logic:** If a rule seems too broad or too narrow, you can filter by it to see a sample of the data it's matching. This helps you fine-tune the logic with confidence. * **Auditing and Transparency:** Quickly answer questions like "Why was this specific row flagged?" by showing the exact rule that triggered the label. ## How to Filter by Assertion Follow these steps to filter your test results by a specific rule. 1. Navigate to the **Test** tab of the policy you want to analyze. 2. In the policy definition panel on the left, expand the label that contains the rule you wish to investigate. 3. Simply **click** on the specific rule (assertion) you want to filter by. 4. When the test results are filtered by an assertion, you are seeing a subset of your data where that specific rule evaluated to `true`. The test results view will automatically update, displaying only the rows that were directly affected by the selected rule. Assertion Filtering 10 8 2025 Gi ## We'd Love to Hear From You Whether you have a suggestion, feedback, or a bug to report, here are the best ways to get in touch: * **In the App:** Use the **Feedback button** for direct suggestions. * **On Slack:** Reach out to the team in your shared channel. * **With your AM:** Talk to your dedicated account manager. * **Via Email:** Send a message to [**support@moonbounce.io**](mailto:support@moonbounce.io). * **Security, availability, or other incidents:** Use the in-app **Feedback button** or email [**support@moonbounce.io**](mailto:support@moonbounce.io). See [Customer Feedback](/feedback/customer_feedback) for what to include.