This paper explores an idea of Stoic descent that is largely neglected nowadays, the idea that an argument is valid when the conditional formed by the conjunction of its premises as antecedent and its conclusion as consequent is true. As will be argued, once some basic features of our naïve understanding of validity are properly spelled out, and a suitable account of conditionals is adopted, the equivalence between valid arguments and true conditionals makes perfect sense. The account of validity outlined here, which displays one coherent way to articulate the Stoic intuition, accords with standard formal treatments of deductive validity and encompasses an independently grounded characterization of inductive validity.

中文翻译：

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作为真条件的有效参数

本文探讨了当今被广泛忽视的斯多葛学派思想，即当由前提作为前件和结论作为后果的合取条件为真时，论证有效。正如将要论证的那样，一旦正确阐明了我们对有效性的天真理解的一些基本特征，并采用了适当的条件说明，有效论证和真实条件之间的等价性就完全有意义了。此处概述的有效性说明显示了一种连贯的方式来阐明斯多葛直觉，符合演绎有效性的标准形式处理，并包含归纳有效性的独立基础特征。