Notes
- Inquiry , I ( 1 ) 52
- 1955 . Logik. Ibr System und ibr Verbältnis zur Logistik 190 Stuttgart/Köln
- Russell , B. 1951 . An Inquiry into Meaning and Truth London ch. xix
- Carnap , R. 1947 . Meaning and Necessity 141 – 2 . Chicago
- Pap , A. 1955 . Analytische Erkenntnistheorie 13 ff. 23 – 26 . Wien
- Macdonald , M. 1954 . Philosophy and Analysis Oxford articles by Carnap and Church.