目次一、抗辩的历史沿革二、抗辩的语义分析三、抗辩在民法上的定位四、小结法理学家博登海默说:“概念乃是解决法律问题所必需的和必不可少的工具。没有限定严格的专门概念,我们便不能清楚地和理性地思考法律问题。”因为“法律中所运用的推理过程,在很大程度上是以含有各种专门性质的概念的规则与原则为基础的”。因此,界定和厘清有歧义的概念,是进 Second, the defensive semantic analysis of three, defensive positioning in civil law Fourth, the summary of the law theorist Bodenheimer said: “concept is the necessary and indispensable tool to solve legal problems. Without the definition of strictly specialized concepts, we can not think clearly and rationally about legal issues. ”Because the reasoning process used in the law is largely based on rules and principles that embrace concepts of various specialized nature based on". Therefore, to define and clarify the concept of ambiguity is to enter