Introduction To Objectivist Epistemology by Ayn Rand

Presents a theory of how the mind forms concepts from perceptual data via measurement-omission, holding that concepts are objective, hierarchical integrations grounded in reality and codified by definitions. It examines axiomatic concepts, the functions of language, rules of definition, similarity, and the problem of universals, and argues for contextual certainty and logic against skepticism, subjectivism, intrinsicism, and the analytic–synthetic dichotomy. Includes workshop-style Q&A that elaborates applications to mathematics, borderline cases, and scientific classification.

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