The good folks at the Veritas Domain have once again allowed me to post.
Good presup is about believing what the Bible says about God and man and then acting accordingly. But I do not see any reason why that means we must get a professing atheist to admit they really know God. In fact, I think it is counter-Scriptural and, as the result, counter-productive. (All Scripture is inherently pragmatic, just not in the way sinful men want it to be, but that’s a different post).