a branch of symbolic logic dealing with propositions as units and with their combinations and the connectives that relate them
双语例句
The present paper investigates an abductive framework in default logic, and gives a solving abduction method in propositional default theories. 摘要研究缺省逻辑表示下的溯因框架，给出一种基于规则的命题逻辑缺省溯因诊断的求解方法。
Propositional variables are the basic building-blocks of propositional formulas, used in propositional logic and higher logics. 命题变量是命题公式的基本构件板块，用于命题逻辑和更高的逻辑中。
