...One of the most common questions asked in the Q and A is something similar to: “Have you taken the time to apply the same approach with all the other religious worldviews?” Sometimes people ask this question because they are curious about how well other ancient religious claims (or alleged eyewitness accounts) hold up under investigative scrutiny. But many times this question is followed by a more pointed objection: “How can you trust Christianity is true if you haven’t examined all the alternatives?”
In every criminal trial, the investigators and prosecutors are obligated to present the evidence related to one defendant. While the burden of proof lies with the prosecutorial team, the prosecution is not required to have examined every possible alternative suspect. If I am investigating a case in which the suspect was initially described as a white male, 25 to 35 years of age with brown hair, the potential suspect pool in Los Angeles County would be quite large; there may be hundreds of thousands fitting this description. As I make the affirmative case related to one of the men in this large group, I’m under no obligation to make the case against the others. In fact, when the jury evaluates the case and decides whether the defendant is guilty, they will do so without any consideration of the alternatives. If the evidence is strong enough to reasonably infer the defendant’s involvement, the jury will make a confident decision, even though many, many alternatives were left unexamined.
The case for Christianity is made in a similar way. While it may be helpful to examine a particular alternative worldview on occasion to show its inadequacies or errors, these deficiencies fail to establish Christianity as factual. How can you trust Christianity is true if you haven’t examined all the alternatives? The case for the Christian worldview must first be made affirmatively even if no other claim is examined negatively. If there’s enough evidence to reasonably infer Christianity is true, we needn’t look any further. The affirmative case will either stand or fall on its own merit, even if we’re unable to examine any other “suspect”.