"When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong"
About this Quote
The mechanics are sly. Clarke splits the scientist into two roles: diagnostician and gatekeeper. In the first, age and distinction are assets; experience helps you sort workable ideas from nonsense. In the second, those same traits become liabilities. “Impossible” isn’t a measurement here, it’s a mood - a defense of established paradigms, reputations, funding structures, and the quiet human desire not to be embarrassed by the next generation. Clarke isn’t anti-science; he’s anti-closure. He’s warning that institutions that excel at explaining the world can still be culturally bad at imagining it.
Context matters: Clarke wrote as a science-fiction author with a technologist’s instincts, watching the 20th century repeatedly humiliate confident predictions (flight, space travel, computing). His own “laws” emerged from a period when rockets went from fantasy to geopolitics, and when yesterday’s “impossible” kept getting built by young engineers with fewer priors and more audacity.
The punchline is probabilistic, not romantic: “almost certainly” versus “very probably.” Clarke leaves room for error on both sides, but he biases toward possibility. It’s a credo for innovation - and a gentle indictment of the way prestige can fossilize curiosity.
Quote Details
| Topic | Science |
|---|---|
| Source | Help us find the source |
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Citation Formats
APA Style (7th ed.)
Clarke, Arthur C. (2026, January 15). When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong. FixQuotes. https://fixquotes.com/quotes/when-a-distinguished-but-elderly-scientist-states-12381/
Chicago Style
Clarke, Arthur C. "When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong." FixQuotes. January 15, 2026. https://fixquotes.com/quotes/when-a-distinguished-but-elderly-scientist-states-12381/.
MLA Style (9th ed.)
"When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong." FixQuotes, 15 Jan. 2026, https://fixquotes.com/quotes/when-a-distinguished-but-elderly-scientist-states-12381/. Accessed 4 Mar. 2026.




