The Logic of Scientific Discovery

Buchzusammenfassung

Karl Popper (1902–94) was one of the twentieth century’s major philosophers, specifically working on the philosophy of science. He began his career in Vienna, his birthplace, and emigrated first to New Zealand and then to the United Kingdom in the 1930s. As well as The Logic of Scientific Discovery, which he wrote while still in Vienna – although he revised it several times later on – another of his well-known works is The Open Society and Its Enemies.

Popper’s philosophy challenges the reliability of inductive reasoning, emphasizing that universal claims, like "All swans are white," cannot be proven through singular observations, as even countless white swans cannot rule out the possibility of a black one. Instead, he advocates for deduction, where universal premises are tested for falsifiability—the cornerstone of scientific validity. This process involves actively seeking contradictions to refine theories, as seen in the shift from “All birds can fly” to “All birds have wings” upon discovering flightless birds. Popper also critiques the role of probability in science, arguing that while probabilities often lack falsifiability, exceptions like Brownian motion integrate them into testable frameworks. He draws parallels between predicting planetary orbits and dice rolls, showing both depend on initial conditions, though our knowledge of these varies. Ultimately, Popper views science as a provisional endeavor, constantly evolving through the refinement of theories in response to anomalies, such as a hypothetical day without sunrise. Contrasting Heisenberg’s uncertainty principle, which sets limits on precision, Popper’s approach embraces the pursuit of ever-greater accuracy, highlighting the shared acknowledgment of uncertainty in scientific knowledge.

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