Thomas Kuhn
Thomas Kuhn's The Structure of Scientific Revolutions was among the most consequential books of twentieth-century intellectual life. It argued that science does not progress through the gradual accumulation of truths but through revolutionary shifts between paradigms — frameworks so fundamental that practitioners working within different paradigms literally cannot see the same evidence the same way. The argument undermined the positivist picture of cumulative progress and left philosophers of science facing a hard question: if paradigms are incommensurable, is science rational at all? Laudan's career was the most sustained and successful attempt to answer that question. He accepted Kuhn's empirical observations about the history of science while rejecting the relativist conclusions many drew from them.
In the AI Story
Kuhn's framework was developed through his historical work on the Copernican revolution and the transition from classical to quantum physics. He observed that scientists working within different paradigms did not merely hold different theories; they worked with different standards of evidence, different definitions of what counted as a problem, and different conceptions of what science was supposed to accomplish. The transitions between paradigms were therefore not straightforward comparisons but Gestalt shifts — the same data appearing in radically different configurations under different organizing frameworks.
The philosophical establishment responded to Kuhn's argument with alarm, because it seemed to make theory-choice irrational. If there is no neutral standard above paradigms, how can we say one paradigm is better than another? Feyerabend pushed the argument toward explicit epistemological anarchism. Scientific realists tried to defend a paradigm-independent standard by appealing to approximation to truth. The debate ground on for two decades without resolution.
Laudan's intervention was to reject both the positivist demand for a fixed standard and the relativist conclusion that no standard exists. His problem-solving framework took the empirical observations that underwrote Kuhn's argument — that standards of evaluation are shaped by the tradition within which the evaluation is conducted — and showed how rational comparison was nevertheless possible. Traditions could be compared by their problem-solving effectiveness, a comparison that required substantive judgment but was neither arbitrary nor circular.
Laudan's research traditions were deliberately more flexible than Kuhn's paradigms. They permitted internal modification without collapse. They cut across disciplines in ways Kuhn's paradigms typically did not. They evaluated traditions by their capacity to develop over time, rather than by the revolutionary moments of their transitions. The framework preserved Kuhn's insights while avoiding his most problematic conclusions.
Key Ideas
Paradigms as total frameworks. Kuhn argued scientific frameworks shape not just theories but standards of evaluation.
Incommensurability. Different paradigms are not strictly comparable, because their standards differ.
Normal and revolutionary science. Most scientific work is puzzle-solving within a paradigm; revolutions occur when anomalies force paradigm shifts.
The challenge to rationality. Kuhn's framework seemed to make theory-choice arational, provoking Laudan's lifelong response.
Appears in the Orange Pill Cycle
Further reading
- Thomas Kuhn, The Structure of Scientific Revolutions (University of Chicago Press, 1962).
- Thomas Kuhn, The Road Since Structure (2000).
- Paul Hoyningen-Huene, Reconstructing Scientific Revolutions (1993).