Logical Positivism and the Vienna Circle's Verification Principle (1920s–1950s)

1. Schlick arrives in Vienna and forms study circle

   Jan 1, 1922Labels: Moritz Schlick, University of, Vienna Circle

   • SEP Vienna
   • Britannica

2. Regular Vienna Circle meetings begin

   Jan 1, 1924Labels: Vienna Circle, Moritz Schlick, logical empiricism

   • Vienna Circle
   • Univ Vienna

3. Carnap joins and the Circle sharpens its program

   Jan 1, 1926Labels: Rudolf Carnap, Vienna Circle, logical analysis

   • Vienna Circle
   • Britannica

4. Verein Ernst Mach founded to reach the public

   Nov 1, 1928Labels: Verein Ernst, Ernst Mach, Moritz Schlick

   • SEP Vienna
   • Vienna Circle

5. Vienna Circle manifesto published and presented in Prague

   Sep 1, 1929Labels: Vienna Circle, Wissenschaftliche Weltauffassung, Prague meeting

   • SEP Vienna
   • Britannica

6. Verification principle becomes central criterion of meaning

   Jan 1, 1930Labels: Verification principle, logical positivism, meaning criterion

   • Britannica
   • Verificationism

7. Popper challenges verification with falsificationism

   Jan 1, 1934Labels: Karl Popper, Falsificationism, The Logic

   • Britannica
   • Vienna Circle

8. Carnap publishes Logical Syntax of Language

   Jan 1, 1934Labels: Rudolf Carnap, The Logical, formal language

   • SEP Carnap
   • Vienna Circle

9. Ayer popularizes verificationism in English

   Jan 1, 1936Labels: A J, Language Truth, verificationism

   • Ayer LTL
   • Ayer

10. Schlick is murdered; the Circle’s Vienna center collapses

    Jun 22, 1936Labels: Moritz Schlick, University of, political violence

    • Schlick SEP
    • Britannica

11. Exile and the Unified Science publishing program

    Jan 1, 1938Labels: International Encyclopedia

    • Britannica IEUS
    • Britannica

12. Quine’s “Two Dogmas” undermines key positivist assumptions

    Jan 1, 1951Labels: W V, Two Dogmas, analytic synthetic

    • Britannica Quine
    • Britannica