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Theory of Logical Calculi: Basic Theory of Consequence Operations/en-ca/theory-of-logical-calculi-basic-theory-of-consequence-operations/E1495395-A3F3-484F-9359-3987750890EB.htmlE1495395-A3F3-484F-9359-3987750890EB
Theory of Logical Calculi: Basic Theory of Consequence Operations