Current human theories include a second variable that the machine did not replicate.

当前的人类理论包括机器无法复制的第二个变量。

Another is that the machine is right, and the second variable is not actually necessary.

还有一个就是机器是对的，第二个变量其实没有必要。

The second variable is for the age of our patient. So age is 20, and finally we need a variable to tell if this is a new or existing patient. That's where we can use a boolean value.

第二个变量是我们患者的年龄。所以年龄是20，最后我们需要一个变量来判断这是否是新的或现有的病人。这就是我们可以使用布尔值的地方。