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Science & Tech Quote by Herbert Simon

"In the computer field, the moment of truth is a running program; all else is prophecy"

About this Quote

Simon lands a needle in the inflated balloon of tech-talk: if it doesn’t run, it doesn’t count. “Moment of truth” borrows the language of ritual and consequence, then drags it into the unromantic world of execution, where the machine either does the thing or refuses. The jab is aimed at a familiar human weakness in scientific and engineering culture: we love persuasive explanations, elegant architectures, confident roadmaps. We also love declaring victory while still safely upstream of reality. Simon calls that what it often is - prophecy - a word that flatters guesswork with the glow of inevitability.

The subtext is epistemological, but it’s delivered like shop-floor common sense. In computing, knowledge is operational. You don’t really “know” an algorithm, a model, or a system until it survives contact with inputs, edge cases, messy dependencies, and the brute fact of finite resources. A running program is empirical evidence: not of beauty, not even of correctness in some formal sense, but of accountability. It can be tested, timed, debugged, and broken. That’s why it feels like truth: it’s falsifiable in a way slide decks aren’t.

Context matters: Simon helped found AI and cognitive science, fields perennially tempted by grand claims about minds and machines. The line is a quiet rebuke to hype cycles and theoretic overreach. It also defends a culture of iteration: build, run, confront the failure, revise. In a domain where language can easily masquerade as progress, execution is the only honest referee.

Quote Details

TopicCoding & Programming
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APA Style (7th ed.)
Simon, Herbert. (2026, January 17). In the computer field, the moment of truth is a running program; all else is prophecy. FixQuotes. https://fixquotes.com/quotes/in-the-computer-field-the-moment-of-truth-is-a-69350/

Chicago Style
Simon, Herbert. "In the computer field, the moment of truth is a running program; all else is prophecy." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/in-the-computer-field-the-moment-of-truth-is-a-69350/.

MLA Style (9th ed.)
"In the computer field, the moment of truth is a running program; all else is prophecy." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/in-the-computer-field-the-moment-of-truth-is-a-69350/. Accessed 12 Feb. 2026.

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About the Author

Herbert Simon

Herbert Simon (June 15, 1916 - February 9, 2001) was a Scientist from USA.

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