假设系统将根据以下自变量给出输出 1 或 0：
(1) variable_a: a float variable in the range of [0, 1], which can be called confidence a
(2) varaible_b: a float variable in the range of [0, 1], which can be called confidence b
(3) varaible_c: a float variable in the range of [0, 1], which can be called confidence c
对于这三个置信度，它们越高，系统输出的可能性为1。越低，系统输出的可能性为0。那么问题是我如何设置一个函数来确定系统的输出基于这些变量。任何想法将不胜感激。