由于社会环境和法律争议纷纭复杂,法官单凭有限的法律规则往往无法全部应对,特别是在两个或者两个以上可能存在的而且各方面都有强有力论据支持的前提或基本原理间进行选择成为必要时,对于一个问题的答案是否正确就会产生疑问。在这种情况下,各方都必须通过对话、辩论、批判性探究等方法来发现最佳的答案。本文试从一起案例入手,通过对法官自由裁量权运用的必要性和左右其运用的因素加以具体分析,以此来论证其在事实认定中的作用。 Due to the complexity of the social environment and legal disputes, judges are often unable to fully respond solely to limited legal rules, in particular, choosing between two or more premises or fundamentals that are likely to be supported by strong arguments in all respects When necessary, doubts about the answer to a question are correct. Under such circumstances, all parties must find out the best answer through dialogues, debates and critical inquiry. This article tries to start with a case study. By analyzing the necessity of using the discretion of the judge and the factors influencing the application of the judge, this paper proves its role in the confirmation of the facts.