Why Assumptions Can Be Hazardous to the Truth of Christianity

by J Warner Wallace

The producers of God’s Not Dead 2 asked me to play a small role in the film, testifying as an expert witness in a civil trial. I was happy to defend the historicity of Jesus and the eyewitness reliability of the Gospels, but I know my efforts sometimes fall on deaf ears. The evidential strength of my case is usually dependent on the pre-existing biases of my audience. If my hearers hold a philosophical presupposition that prevents them from hearing (or fairly evaluating) what I have to say, the truth will elude them. Assumptions can be hazardous to the truth of Christianity.

I began to understand the hazard of philosophical presuppositions while working as a homicide detective. In Cold-Case Christianity, the book featured in my scene in God’s Not Dead 2, I describe a murder scene I investigated with my partner, Alan Jeffries. The murder appeared on the surface to be a domestic violence crime. Alan and I stood inside the yellow tape, doing our best to answer the question “Who murdered the victim?” But, one of us already had an answer. According to Alan, spouses or lovers typically commit murders like this; case closed. We simply needed to find this woman’s husband or lover. It was as if we were asking the question: “Did her husband kill her?” after first excluding any suspect other than her husband. It’s not surprising that Alan came to his conclusion; he started with it as his premise. As it turned out, Alan was wrong this time. Our killer was an unrelated neighbor. Alan’s assumption prevented him from evaluating the evidence fairly and nearly derailed our investigation.

When I was an atheist, I did the very same thing…


Why Assumptions Can Be Hazardous to the Truth of Christianity | Cold Case Christianity