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References
- ↑ Peirce, Charles Sanders (1992), Reasoning and the Logic of Things: The Cambridge Conferences Lectures of 1898, Harvard University Press, Footnote 70, pp. 279–280, ISBN 9780674749672 .
- ↑ Peirce, pp. 99–102.
- ↑ Peirce, p. 99.
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