Johnson, Fred (Frederick A.), authorKluwer Academic Publishers, publisher2007-01-032007-01-031997Johnson, Fred, Extended Gergonne Syllogisms, Journal of Philosophical Logic 26, no. 5 (October 1997): [553]-567. http://dx.doi.org/10.1023/A%3A1004225124213http://hdl.handle.net/10217/39023Syllogisms with or without negative terms are studied by using Gergonne's ideas. Soundness, completeness, and decidability results are given.born digitalarticleseng© 1997 Kluwer Academic Publishers.Copyright 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.negativelogiclanguagesyllogismTexthttps://dx.doi.org/10.1023/A%3A1004225124213