Exemplar

An exemplar in Kuhn's philosophy of science is a concrete problem-solution that functions as a template for future research. It is not an abstract rule or a general principle but a specific achievement — the hydrogen atom, the double helix, the pendulum — that trains researchers to recognize new problems as similar and to apply appropriate techniques without explicit instruction. The exemplar is the narrow sense of paradigm, the sense Kuhn himself later preferred.

The exemplar function explains why scientists learn through practice rather than through axiom memorization. A student of physics does not learn quantum mechanics by studying postulates; she learns it by solving problems whose solutions become perceptual categories. The exemplar is therefore not merely pedagogical. It is cognitive infrastructure: it shapes what researchers notice, what they expect, and what they find surprising. The template nature of exemplars makes normal science possible by converting creative problem-solving into pattern-matching — but it also makes paradigm-bound blindness possible by converting pattern-matching into unthinking habit.

The exemplar is the most underrated concept in Kuhn's work. It explains why scientific training is apprenticeship, not classroom instruction — and why scientific revolutions are perceptual revolutions, not merely logical ones.