I don't believe that non-Christians are irrational, but I sincerely believe that the Christian worldview has superior cognitive and behavioral authority for setting a worldview framework for our approach to science, art, or ethics—indeed, all of life. To me it is the best explanation of reality with the greatest explanatory scope, power, plausibility, less ad hoc, accords with accepted beliefs (common sense), and comparative superiority.
It seems obvious to me that you could be thinking rationaly without having all the necessary facts or be dysfunctional in your methodolgy. We do that in our daily lives and in our theological espistemology every day. Just because you reach a different conclusion about Calvinism, Arminianis, or Molinism, I don't call you irrational. You could be interpreting incorrectly, be ignorant of certain facts, or reach a point where you've denied blatent facts or truths so long that your methodology is flawed do to your choices. But your still conducting yourself rationaly within that skewed framework.
Our choices related to General and Special revelation will have eternal consequences. We are without excuse concerning God’s invisible qualities—his eternal power and divine nature because He made it obviously accessable. It is us who chose to disreagard adequate explanations. Then we are given over to our (wicked) choices. (Romans 1: 18-20)
If a person with a mental health disorder makes decisions related to their hallucinations, they aren't making an irrational decision. They are making a rational decision with a dysfunctional brain--with what they think they know. I think that that is where our wicked choices lead us. We are given over to a dysfunctional brain. A persona like that isn't operating irrationally at that point. They are operating without the truth. Have you ever thought you knew something, and worked through it rationally--only later to find that you were missinformed. If you chose to stay misinformed that would be a wicked choice with serious consequences.
So, if you and I are disagreeing on a matter that I think is obvious, one of us must be irrational--it certainly isn't me.
