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4. Feigl, Herbert: 1949, ‘The Logical Character of the Principle of Induction’, in Herbert Feigl and Wilfrid Sellars (eds.), Readings in Philosophical Analysis (New York: Apple-ton-Century-Crofts), pp. 297–304. Originally published in Philosophy of Science I (1934).
5. Feigl, Herbert: 1950, ‘De Principiis Non Disputandum…?’ in Max Black, ed., Philosophical Analysis (Ithaca, NY: Cornell University Press), pp. 119–56.