1 1882-1945 1889-1951 1891-1970 1897-1959 1910-1989 198 415 5 analysis analysis(philosophy) ayer b820 carnap causality(physics) ci4870 ci4871 comparativeandgeneral congresses convention(philosophy) experience friedrich grammar history intellectuallife kausalität knowledge languageandlanguages linguisticphilosophy logic ludwig naturalism neurath otto philosophy positivismus rationalism religiousaspects rudolf scandinavia science socialsciences symbolicandmathematical syntax theoryof verification(empiricism) viennacircle waismann wittgenstein