Exercise 3: Why the 3am Outage Scenario Is Left Unresolved — Possible Solution ==================================================================== WHAT THE CHAPTER SAYS ------------------------------ Per this chapter, "nothing about this is resolved in this chapter - it's deliberately left open. Chapter 8 comes back to it directly, once the material on testing a runbook has actually been covered." WHY IT'S LEFT OPEN RATHER THAN ANSWERED HERE ------------------------------ Chapter 1 hasn't yet taught how to actually test a runbook before it's needed live (Chapter 8's own subject). Resolving the scenario here would mean either skipping ahead to material the reader doesn't have yet, or offering a shallow fix without the reasoning behind it - the same structural reason backup1's own Chapter 1 left its deleted-folder ticket open until its own verification material had been covered. WHY THIS PARTICULAR SCENARIO WORKS AS A HOOK ------------------------------ The runbook in the scenario wasn't badly written - it was accurate when created. It became wrong silently, over eight months, as the underlying system changed without the document being updated to match. That's exactly the kind of failure this chapter's own central claim predicts: a document that existed, looked complete, and had presumably worked before, failing at precisely the moment someone actually depended on it - discovered only because a real outage forced someone to use it. THE CHAPTER THAT RESOLVES IT ------------------------------ Chapter 8, "Testing a Runbook Like You'd Test a Backup" - the chapter explicitly named as returning to this exact scenario, since testing a runbook before an emergency is precisely the practice that would have caught the outdated hostname before a real 3am outage ever depended on it. WHY THIS WORKS AS AN ANSWER ------------------------------ It explains why resolving the scenario immediately would have been premature given what hasn't been taught yet, explains why this specific scenario (a document that decayed silently rather than one that was simply wrong from the start) is a strong teaching hook for this chapter's own central claim, and names the exact chapter (Chapter 8) that returns to it.