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Meeting of 21st February 1948.
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Ridder, J. Logic of propositions. Synthese 6, 496–502 (1948). https://doi.org/10.1007/BF00590718
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DOI: https://doi.org/10.1007/BF00590718
Keywords
- Deductive System
- Latin Letter
- Identical Formula
- Deduction Rule
- Arbitrary Object