Logical positivism (later referred to as logical empiricism, rational empiricism, or neo-positivism) is a philosophy that combines positivism—which states that the only authentic knowledge is scientific knowledge—with a version of apriorism—the notion that some propositional knowledge can be had without, or "prior to", experience.
Logical positivism denied the soundness of metaphysics and traditional philosophy, and affirmed that statements about metaphysics, religion and ethics are devoid of cognitive meaning and thus nothing but expression of feelings or desires; only statements about mathematics, logic and natural sciences have a definite meaning.
Logical positivism originated in the Vienna Circle in the 1920s, where Rudolf Carnap, Otto Neurath, and others (see Philosophers associated with logical positivism in this article) divided meaningful statements into those which are analytic (true a priori), and those which are synthetic (verified by sensory experience, a posteriori) - this was perhaps presaged by Hume's fork. Logical positivism refuted synthetic a priori knowledge: an evident criticism to Kantian philosophy.
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Analytic Philosophy :: Philosophy
Epistemology :: Philosophy
Philosophy of Science :: Philosophy

Columbia Encyclopedia: Logical Positivism - A concise description of this movement.
Meta Description: [ logical positivism. The Columbia Encyclopedia, Sixth Edition. 2001-05 ]
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Comte, Ayer and Logical Positivism - Lecture reviewing the development of this doctrine and its impact on psychology.
FOLDOC: Logical Positivism - Entry from this philosophical database, including an excerpt from The Ism Book.
Neopositivism: Linguistic Philosophy and Critical Rationalism - A section from Andras Gedo's work Crisis Consciousness in Contemporary Philosophy.
Meta Description: [ Chapter 2, part 1 of Crisis Consciousness in Contemporary Philosophy by Andras Gedo. ]
PhilosophyPages: Logical Positivism - Concise survey of this school and the related doctrine of ethical emotivism.
Meta Description: [ A survey of the history of Western philosophy. ]
PhilSci Archive: Logical Positivism/Logical Empiricism - Collection of online papers in Microsoft Word format, with abstracts in HTML.
Wikipedia: Logical Positivism - Entry from the openly-edited encyclopedia.
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