This is John Loftus' most recent defense of the outsider test for faith. I think I have some problems I would like to see him solve if he is going to defend it.
First, it would be good if the argument could be formulated with premises and a conclusion. Exactly what is he arguing for, and what is the basis for his argument.
Second, it would be cheating to have a test and just mark our religious beliefs as the beliefs to be tested. Keith Parsons once asked, "Tell me, do you really think that, had you been born Vijay instead of Victor, and if you were from Bangalore rather than Phoenix, AZ, that you would not now be as devoted to Brahma as you are to God?" And the answer is I don't know. If Keith had grown up in the United Methodist church that I did, and had he discovered Plantinga or Lewis before leaving the fold, as opposed to converting briefly to West Rome Baptist Church and hearing weekly hellfire threats as an undergraduate, would he now be a Christian philosopher instead of an atheist? The "what if" game is far harder than it looks to play.
But I happen to know something about Vijay. Keith and I agree that there is an independently existing physical world. Vijay does not. If either of us had been born Vijay, we would think of the world of experience as maya, or illusion, and we would not see it as ultimately real. So it looks as if external world realism fails the outsider test. Yet I see no reason to be accept external world skepticism because if I had been born in India, I might have been brought up to reject external world realism.
What about moral beliefs? I think that rape is wrong. If I had been brought up in a certain culture, I'm told, I would believe that rape is OK if you do it in the evening, because a woman's place is at home under her husband's protection, and if she is gone she's asking for it. So my belief that rape is wrong flunks the outsider test. This gives me no basis whatsoever for doubting that rape is wrong.
What about political beliefs? I think that representative democracy is a better form of government than monarchy. If I lived in 16th Century Europe, or in other parts of the globe, I probably would not believe that. So my belief in democratic government flunks the outsider test. However, this gives me no reason to have the least doubt that democracy is better than monarchy.
What about scientific beliefs? If I had been born in the Islamic world, or in some Christian churches, I would have been taught to reject the theory of evolution in its entirety. So it looks like the theory of evolution fails the outsider test. Nevertheless, this in itself is insufficient grounds for the slightest doubt about evolution.
Finally, a certain natural conservatism with respect to changing our minds about matters of world-view, or any other issue for that matter, is both natural and rational. I thought the lesson of things like Cartesian foundationalism is that if you throw out all sort of beliefs as unjustified and load the burden of proof onto those beliefs, it's hard to stop and have anything left. Most people thought that Descartes had to cheat to get his world back. If we have to be skeptics about all of our sociologically conditioned beliefs, I am afraid we are going to be skeptics about a lot more than just religion.