Prototype Theory

Prototype Theory is a framework for understanding how humans categorize concepts, proposing that categories are organized around prototypes—the most typical or central members. Developed by Eleanor Rosch in 1973, the theory challenges classical logic's view that categories have fixed boundaries defined by necessary-and-sufficient features. Instead, prototypes have fuzzy boundaries and graded membership: some instances are more central (robin is a prototypical bird) while others are peripheral (penguin is a bird but less typical). Prototype Theory has profound implications for understanding language, cognition, and meaning.