- Mathematics and Philosophical Logic
- Experimental Science
- Observational Science
- Historical Knowledge
- Philosophical and Theological Argument (Inference to the Best Explanation)
Inference to the Best Explanation is a kind of abductive reasoning in which one chooses the best hypothesis or theory that best explains the available data. We use this form of reasoning in our everyday activities and in legal trials. The problem for Christian apologists is that scientific and historical investigation, the higher levels of certainty, lead to rejection of all claims for a God. Another factor to consider is that claims for a God are extraordinary, which require extraordinary evidence (link).