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：2016
卷号：20
期号：1
页码：99-115
语种：English
出版社：Universidade Federal de Santa Catarina, Brasil
摘要：http://dx.doi.org/10.5007/1808-1711.2016v20n1p99 In this paper we criticize the way possibility is characterized in contemporary modal logic through the diamond operator. We explain that it does not match with the usual notion of possibility and that this notion is better described by the vertex Y of the hexagon of opposition usually called contingency.
关键词：Possibility;contingency;Necessity, aquare of opposition;hexagon of opposition;modal logic.
