Logical positivism is the modern British and American variety of positivism. This school has been influenced largely by the teachings of the so-called Vienna Circle founded in 1924 by Moritz Schlick (1882-1936). The chief exponents of this school have been Otto Neurath (1882-1945) and Rudolf Carnap (1891-1970). The significance of the logical positivists for the study of Mises' Human Action lies in the fact that their fundamental thesis rejects all non-experimental methods of research and thus denies the existence of any a priori knowledge.
- Percy L. Greaves, Jr. "Mises Made Easier ", 1974. Referenced 2014-07-19.