HOW DOES PRESUPPOSITIONAL APOLOGETICS DEAL WITH PEOPLE WHO KNOW THE BIBLE?

At 32:30 Matt Dillahunty mentions that he was a churchgoer for 25+ years:

And here, Tim Stratton briefly shares about a kid in his youth group who knew all the Bible’s claims but simply didn’t think they stood up to counter-evidence and opposing arguments:

The same story as above, expanded from 03:00 to 07:10:

Under a presuppositional apologetics model, how would citing more Scripturally-derived truths at them help?