可废止逻辑中论证关系的一点辨析

摘要

可废止逻辑具有线性的计算复杂性和有效的规则冲突处理机制,在处理非单调性的推理和论证中具有显著的优势.但在可废止论证关系上,普拉肯(Prakken)、贝克斯(Bex)和萨托(Sartor)等学者采用的先建构完整的论证结构,再通过击败关系来分析论证的方法将会导致一些严重的问题.为避免这样的问题,在可废止逻辑中,应当将论证的建构和论证的评价结合起来分析论证关系.%Defeasible logic has several characteristics,such as linear computational complexity and effective conflict processing mechanism, which can deal with nonmonotonic reasoning and argument more effectively.In defeasible argument, Prakken,Bex and Sartor put forward a kind of analysis method,which is characterized by constructing a whole frame of argument before analyzing between argument with defeat relation, but this practice also causes serious problems. To avoid such problems, it is advisable to combine the process of argument construction with argument evaluation in defeasible logic.