Theism being a rational belief has been argued for centuries. Many different forms of arguments and evidence have been presented, different positions of how to have knowledge and many other aspects. This conversation will explore foundational reasons to infer to God on a rational basis.
The below video is a conversation between a Christian and an Atheist about the rationality of theism. This is a follow up from a conversation with a different Christian about a position called Presuppositionalism. This is a position about knowledge that believes the existence of God and the truth of the Bible needs to be presupposed in order to have any other knowledge or beliefs and that no other prior axioms or beliefs can infer to God or the Bible. You can see that video here.