After your elaboration in this post we are pretty much on the same page. The (mis) characterization stems from the one line response to the other anon which was suffering from a lack of detail.
>What is going to be this external standard of validation, and on what basis is it to be accepted? How is it able to stand above and in judgement of God's self-attesting word?
I see it as God's manifest action, in conjunction with His self-attesting word, regardless of human judgement concerning it. As in the Old Testament, Isaiah calls for fire from heaven on Mount Carmel, demonstrating the superiority of the Lord in contrast to the impotence of Baal. Or in the New Testament, we have events such as the Father's declaration at the Baptism of Christ, and the Transfiguration, attesting to His divinity. Everything in creation to this day still affirms His existence. Of course, this is something that is only seen through faith as you elaborate, and as you say,
>I am not saying accepting Christian faith requires setting aside your reason, I am saying rejecting Christian faith requires giving up your reason altogether.
>Of course they will, and they will do that to you too. What led you to think unbelievers were reasonable?
I do not (hold that they are naturally reasonable), but in an evangelistic setting we do not know who among the presently (visibly) unbelieving have been elected to conversion, repentance, and salvation. The reprobate will never accept God regardless of our preaching, however this rejection does not come from any deficiency of reason on the part of the Christian religion; rather as I have heard it said once in a sermon, our faith is most
reasonable, and this is self-evident to those (by the working of the Holy Spirit, not by their own natural faculty) that hear and are convinced by the gospel.