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PHILOSOPHY Philosophy of Science Falsifiability

Falsifiability

Falsifiability defines scientific theories by their capacity to be disproven through observation

9 Nov 2025

Why did Karl Popper argue that falsifiability, rather than verifiability, is the key criterion for scientific theories?

Because verifying a theory requires complex experiments that are often impractical to perform. Because falsifiability allows scientists to prove theories true through repeated testing. Because a theory can never be conclusively verified by all possible observations, but a single contradictory observation can falsify it.

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PHILOSOPHY Philosophy of Science Karl Popper

Karl Popper

Karl Popper revolutionized science with his idea that theories must be falsifiable to be scientific

8 Nov 2025

What is the key criterion Karl Popper proposed to distinguish scientific theories from non-scientific ones?

Verification, meaning a theory must be repeatedly confirmed by observations Consensus, meaning a theory is scientific if most scientists agree on it Falsifiability, meaning a theory must be testable and potentially refutable by experiments