Exercise 2: Why an Unconfident ETA Is Worse Than Admitting Uncertainty — Possible Solution ==================================================================== WHAT THIS CHAPTER SAYS ------------------------------ Per this chapter's warn-box, "committing to a specific fix time you're not actually confident in, then missing it, costs more trust than a plain 'we don't have a confident timeline yet, next update in 30 minutes.'" WHY A MISSED ETA IS SPECIFICALLY DAMAGING ------------------------------ A specific ETA is a promise, and missing it isn't just "still no answer" - it's a broken commitment stacked on top of the original incident. The person who was told "fixed by 3pm" and finds it's still broken at 3:15 now has two problems to be frustrated about: the original incident, and a promise that wasn't kept. This compounds the damage rather than simply extending it. WHY HONEST UNCERTAINTY DOESN'T HAVE THIS COMPOUNDING EFFECT ------------------------------ Per this chapter, "the second one is less satisfying in the moment, but it's honest - and it doesn't compound the original problem with a broken promise on top of it." Admitting no confident ETA exists sets accurate expectations from the start - there's no promise to later break, so trust erodes only as much as the original incident itself costs, not an additional broken-commitment penalty on top of it. WHY THIS MATTERS FOR HOW UPDATES SHOULD BE WRITTEN ------------------------------ This reasoning argues specifically against the instinct to sound reassuring by giving a confident-sounding timeline under uncertainty - the momentary comfort of a specific number isn't worth the larger trust cost if it turns out to be wrong, which per this chapter's own earlier point about honest updates, is a real risk worth taking seriously. WHY THIS WORKS AS AN ANSWER ------------------------------ It explains the specific compounding mechanism (a broken promise stacked on the original problem) that makes a missed ETA worse than honest uncertainty, rather than simply asserting that honesty is "better" without explaining the actual cost difference.