期刊名称：Principia : an International Journal of Epistemology
印刷版ISSN：1414-4247
电子版ISSN：1808-1711
出版年度：2019
卷号：23
期号：2
页码：145-151
DOI：10.5007/1808-1711.2019v23n2p145
出版社：Universidade Federal de Santa Catarina, Brasil
摘要：I will apply a technique employed by Giovanni Girolamo Saccheri in Logica demonstrative (1701) to concisely prove the invalidity of moods of the First Figure of the Theory of the Assertoric Syllogism without appealing to facts outside logic..
