We’ve Got Mail: When does rational discourse come to an end?

I was having a discussion with a friend, and he made the statement that using the Bible as one’s ultimate authority was self-referential and therefore invalid (like you’ve never heard this one). 🙂 I responded by explaining to him that his method of determining truth, autonomous reason, was circular and as it appealed to nothing higher than himself, arbitrary. What he said next floored me. He agreed that using his own reason as his ultimate authority was arbitrary. It did not concern him in the least. How do you reason with someone who (arbitrarily) says that their (arbitrary) reasoning is right, and that a Biblical worldview is incorrect? What do you do when presuppositionalism proves, shows, or leads one’s conversation partner to admit that their worldview is arbitrary/inconsistent, and they agree, and further, do not care? Is rational discussion over at that point? Any thoughts?

Scratchin’ my head and praying,

Justin

https://choosinghats.org/2012/11/the-consistently-inconsistent-worldview-objection

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