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Again and again Quote by Stephen Jay Gould

“All interesting issues in natural history are questions of relative frequency, not single examples. Everything happens once amidst the richness of nature. But when an unanticipated phenomenon occurs again and again—finally turning into an expectation—then theories are overturned.” quote by Stephen Jay Gould
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“All interesting issues in natural history are questions of relative frequency, not single examples. Everything happens once amidst the richness of nature. But when an unanticipated phenomenon occurs again and again—finally turning into an expectation—then theories are overturned.”

Stephen Jay Gould

About This Quote

Source Book: The Structure of Evolutionary Theory, Harvard University Press, 2002

Scientific theories evolve when repeated anomalies become expected patterns, overturning old ideas.

In simple terms: Repeated anomalies reshape theories.

Key Takeaway

Embrace data that challenges assumptions.

Themes

science theory change evolution

Mood

analytical thoughtful

Type

scientific educational

When to use this quote

  • research
  • education
  • policy making

Key Concepts

philosophy of science empiricism paradigm shift

Questions to Reflect On

  • How do you handle contradictory evidence?
  • When should a theory be revised?
A Different Perspective

Anomalies may be dismissed as noise.

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