(quote from RealReality.org/Real_Faith_and_Reason_Vol_2_-_Scientia.pdf)

False Claim: All Reason Must begin with Assumptions

We’ve answered this claim, but we bring it up again because many persuaders say we must base all reasoning on assumptions. As we consider this claim, we understand axioms and presuppositions are types of assumptions, but we don’t believe all reasoning must begin with assumptions. Instead, we believe God is real rather than merely conceptual. We believe God is real because we know Him through Christ. We constantly experience the Holy Spirit leading, teaching, and correcting us moment by moment. As far as alternatives, we don’t know of any way other than either divine revelation or made-up stuff on which to base our reasoning. We base all reasoning on either assumptions or divine revelation.

(end quote)