“Anomaly and the Emergence of Scientific Discoveries”
— Thomas KuhnThe Structure of Scientific Revolutions (1962), chapter VI; exact chapter title

Commentary

This entry records a verified chapter title rather than presenting a chapter heading as a sentence spoken by Kuhn. The concept of anomaly is essential to his explanation of scientific change. An anomaly arises when an observation or experimental result resists expectations established by a prevailing paradigm. Such a discrepancy does not automatically overthrow the existing framework: scientists may initially investigate measurement errors, refine instruments or develop supplementary explanations. Anomalies acquire greater historical significance when they persist, become scientifically important and contribute to a wider crisis of confidence. Kuhn thereby distinguishes the occurrence of an unexpected result from the recognition of a discovery. This distinction also prevents an overly simple account of scientific revolutions in which one contradictory observation immediately replaces an established theory.