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Quotation from Illustrations of the Logic of Science by Charles Sanders Peirce
“He who would not sacrifice his own soul to save the whole world, is, as it seems to me, illogical in all his inferences, collectively. Logic is rooted in the social principle.”
Illustrations of the Logic of Science, The Doctrine of Chances, IV (Chance, Love, and Logic (1923), Project Gutenberg text)

Peirce's conclusion that long-run reasoning requires identifying oneself with an unlimited community.
Citation: "He who would not sacrifice his own soul to save the whole world, is, as it seems to me, illogical in all his inferences, collectively. Logic is rooted in the social principle." — Charles Sanders Peirce, Illustrations of the Logic of Science, The Doctrine of Chances, IV (Chance, Love, and Logic (1923), Project Gutenberg text). (id peirce-illustrations-of-the-logic-of-science-q6)
Portrait: Charles Sanders Peirce, Napoleon Sarony, Public domain.
