必要条件假言命题若干问题新探

New Exploration of Some Problems About the Hypothetical Proposition Under Necessary Conditions

就必要条件假言命题的汉语表达式及其分类、判定真假依据、负命题的等值式,以及以此类命题作前提的反三段论等问题,作出了全新的探讨。归纳出16种汉语表达式,并加以分类;认为:必要条件假言命题的真假只能依据其前、后件之间客观上是否具有必要条件关系之标准来判定;认为p←q实即p→□q,其否定式是“p∧□q”,而不是“p∧q”;揭示了必要条件反三段论的内涵、逻辑结构,并给出了它的有效推理式。

The author makes a new exploration about such problems as the Chinese expression and its classification, the basis of true or false judgment, the equivalent expression of the negative proposition of the hypothetical judgment under necessary conditions and the anti-syllogism under the condition that the proposition is used as the premise. Sixteen kinds of Chinese expressions are induced and classified. The judgment of true or false hypothetical proposition under necessary conditions depends only on whether there is an objectively necessary conditional relationship between the antecedent and consequent. actually means and its negative expression is The intension and the logical structure of the anti -syllogism under necessary conditions are revealed and its effective forms of inference are expressed.