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Keywords: Scan of "Proceedings of the Cambridge Philosophical Society 19 (1917-1920)" (English, page 37).png Scanned page from A Reduction in the number of the Primitive Propositions of Logic Photocopy from volume 19 of Proceedings of the Cambridge Philosophical Society 1916-10-30 Jean Nicod Public domain because author has been deceased for more than 70 years Jean Nicod texts English PD-old |