I wonder how much this issue has been explored. Ignoring the fine distinctions between ancient and modern foundationalisms, does VTianism posit properly basic beliefs, and if so, what are they? Foundationalism is often tied to internalism and justified true belief. Bahnsen explicitly affirmed such in CVT: R&A, p. 178. I debated a certain cultist on this passage and he refused to own up to it. Not sure why, since I wasn't actually attacking his system.