How does falsifiability help distinguish empirical scientific statements?

In the philosophy of science, the criterion of falsifiability serves as a demarcation line between empirical science and non-scientific disciplines. Proposed by Sir Karl Popper, this standard asserts that a theory is genuinely scientific only if it is possible in principle to prove it false through observation.1

Falsifiability distinguishes empirical statements by emphasizing that scientific theories are never definitively confirmed; rather, they are incrementally corroborated by surviving rigorous attempts at refutation. If a theory is structured such that no conceivable observation could contradict it, it lacks the empirical content necessary to be considered scientific. Consequently, Popper argued that fields like astrology, metaphysics, Marxism, and psychoanalysis fall outside the realm of empirical science because their claims cannot be subjected to this type of falsifying test. This approach ensures that scientific inquiry remains grounded in testable, experiential evidence rather than unfalsifiable dogma.12