I’ve been thinking lately about presuppositional apologetics, following (among other things) this post on Aron Ra’s blog. I’ve got the beginnings of an approach to addressing presuppositionalism, and just for fun I thought I’d throw out what I’ve got and see what kind of comments it gets. My approach is a bit Pascalesque [EDIT: Cartesian?]: I start with the premise that there is one presupposition we all share (necessarily so) and at least one fact about which we are each absolutely infallible. From these I believe we can build a rational system which will allow us to examine any other presuppositions we might make, and evaluate which of these, if any, are more likely to be correct than the others.