"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair"
About this Quote
The intent isn’t just to laugh at engineering hubris; it’s to skewer a cultural habit of treating complexity as reassurance. “Cannot possibly” is the language of sales copy, management decks, and institutional self-soothing. Adams punctures it by pointing out what those claims really buy you: when the improbable happens, you’ve built the failure into the walls. The problem isn’t that it breaks; it’s that the architecture has made repair socially and technically inaccessible. You can’t “get at” it. Responsibility diffuses. The manual is missing. The experts are offshore. The system is proprietary, locked, or too intertwined to isolate.
In context, this is peak Adams: sci-fi comedy used as a diagnostic tool. His worlds run on overconfident technology and underconfident humans, where catastrophe isn’t a lightning strike but an emergent property of “clever” design. Read now, it lands even harder: from financial instruments to algorithmic platforms to critical infrastructure, we keep building machines that promise frictionless certainty and then act shocked when failure arrives with a service outage, a cascading crisis, and no clear place to put the wrench.
Quote Details
| Topic | Witty One-Liners |
|---|---|
| Source | Unverified source: Mostly Harmless (Douglas Adams, 1992)
Evidence: Page varies by edition (verified in at least one omnibus as p.714; also reported as p.104 in an Italian edition). The quote is consistently attributed to Douglas Adams’s novel Mostly Harmless (the 5th Hitchhiker book) across multiple secondary references. However, pinning down the exact page in t... Other candidates (2) Six Chemicals That Changed Agriculture (Robert L Zimdahl, 2015) compilation97.3% ... The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a... Douglas Adams (Douglas Adams) compilation32.6% self saying nothing ch 17 there was constant talk about hewing things and ravaging things and splitting things asunde... |
| Cite | Cite this Quote |
Citation Formats
APA Style (7th ed.)
Adams, Douglas. (2026, January 14). The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair. FixQuotes. https://fixquotes.com/quotes/the-major-difference-between-a-thing-that-might-15601/
Chicago Style
Adams, Douglas. "The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair." FixQuotes. January 14, 2026. https://fixquotes.com/quotes/the-major-difference-between-a-thing-that-might-15601/.
MLA Style (9th ed.)
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair." FixQuotes, 14 Jan. 2026, https://fixquotes.com/quotes/the-major-difference-between-a-thing-that-might-15601/. Accessed 4 Feb. 2026.








