But this doesn t mean that the Bible is the inspired Word of God or that Christianity is true. It only proves that Genesis gives a reasonably accurate account of a large boat that finally came to rest in what is today Turkey. Presuppositionalists know that men reject Christianity not for intellectual reasons, but for ethical reasons. Unbelievers will always be able to discount any evidence Christians may offer, since they can interpret that evidence within their own Christ-rejecting system. Unbelievers interpret all of life in terms of their own covenant-breaking presuppositions.
Christians interpret all of life in terms of their own covenant-keeping presuppositions.
The variation is in man s ethical nature. The answer to that question is as profound as it is simple. Presuppositional apologists argue that unless one affirms Christianity, he can affirm nothing at all. You have to presuppose the God of the Bible in order to know or presuppose anything at all. Of course not, but in order to know, they must borrow from the system of Christian truth.