Another criticism of the outsider test is that it is practically impossible. As stated previously, there is no belief vacuum, not even agnosticism. Everyone fits into some category and there is no way to be “outside” of every belief. How can someone truly exercise the outsider test when there is no "outside" to equally judge the various beliefs?
People who advocate the outsider test commit special pleading in that they want religious people to “step outside” of religion so that non-religion can be evaluated objectively. Simultaneously, they complain that those religious people don’t accept nontheist beliefs because they don’t understand or don’t try the best arguments against religion. In other words, they don’t want religious people to be religious and they want religious people to be nontheist so that they can be swayed by the best arguments against religion. So, it’s special pleading. Nontheists are basically telling theists to “get out of all beliefs except nontheism”. Many nontheists don't even recognize that they are doing this.
Regardless, there are many, many followers of Christ who can accurately reproduce and respond to the most current, most forceful arguments from nontheists against Christianity yet, they remain unconvinced by nontheist conclusions. Many more followers of Christ are aware of these rebuttals. Therefore, it isn’t totally accurate to say that Christians are ignorant of these arguments.