THE RELATIONSHIP BETWEEN CONDITIONALS AND DENIED CONJUNCTIONS IN STOIC LOGIC
THE RELATIONSHIP BETWEEN CONDITIONALS AND DENIED CONJUNCTIONS IN STOIC LOGIC

Summary/Abstract: There is a controversial Cicero’s passage in De Fato that states that, according to Chrysippus of Soli, it is more adequate to express certain conditionals as negated conjunctions. That idea seems to mean that the relationship between conditionals and denied conjunctions is not in Stoicism the same as in standard logic. For this reason, I analyze in details the passage in this paper and, to do that, use the methodological resources of a contemporary reasoning theory: the mental models theory. My conclusion is that, if we adopt a semantic perspective such as that of the mentioned theory, it can be easier, on the one hand, to understand Stoic logic in general and that Cicero’s passage in particular, and, on the other hand, to respond to Cicero’s complains in that same passage.

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