Johnson, Fred (Frederick A.), authorDuke University Press, publisher2019-10-232019-10-231979-04Johnson, Frederick A. Copi's method of deduction. Notre Dame J. Formal Logic 20 (1979), no. 2, 295-300. https://doi.org/10.1305/ndjfl/1093882535. https://projecteuclid.org/euclid.ndjfl/1093882535https://hdl.handle.net/10217/198385born digitalarticlesengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.classical first-order logicTexthttps://doi.org/10.1305/ndjfl/1093882535