Debugging rewards a written trail. A notebook keeps hypotheses visible and prevents circular investigation.
Write the Question
Start with the exact behavior you are trying to explain. A precise question narrows the search space.
Track Evidence
Record commands, timestamps, dashboards, and logs. Mark assumptions clearly so you can revisit them later.
End with a Runbook
When the incident is over, convert the useful steps into a small runbook. Future-you will thank present-you.