Check it out HERE
As Jason illustrates, the necessary foundation for logic, science and morality is the Christian worldview. The unbeliever doesn't have this foundation, thus he is left with beliefs that he cannot account for given his worldview.
The unbeliever is not forthright in his assertions against the Christian worldview since he must borrow from the Christian worldview in order to even affirm or deny Christianity.
The issue is not about evidence. The believer and unbeliever has the same evidence. The issue is how one should interpret the evidence. By what set of presuppositions or world view ought we to interpret the evidence? By the Christian worldview that lays the necessary foundation for knowledge, science, logic, and morality.