"If Dawkins and Krauss want to understand what Catholics believe, there would have to be preliminary discourse about a richer sense of rationality, one not limited to the natural sciences. To say that only the natural sciences reach truth is to make a philosophical claim about truth, which goes beyond the sciences themselves."

And the "Faith" answer is?

Anything we choose to imagine. er.... that's it, just because it is an indefensible worldview from an ancient world of superstition, magic and ignorance, doesn't mean that it still can't trump the demonstrably derived factual data. The trump is "well our science does not actually give the answer to every nuance of the universe, therefore our imagination does. QED."

Or to put it another way we will continue to to deny evidence not because we can't face the truth, but because we can't admit that we might be wrong.