On Evidentialism, Part 4: Is reconversion theologically possible?

Here I answer a potential objection to the discussion in Part 3. The potential objection, based on Hebrews 6:4-6, is that reconversion after apostasy is impossible. Therefore (the objection would go), if God is going to be faithful and provide what man needs to be saved, he is going to have to provide a Christian in an evidence-poor situation with some other powerful defeater-defeater before that person deconverts, because otherwise it will be too late. I've never heard anyone make this precise argument for the defeater-defeating internal witness of the Holy Spirit for believers, but it seems like a reasonable thing to try. Here I suggest four alternative interpretations of that passage which would retain the possibility of reconversion.