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

Assuming as a Way of Knowing

We’re talking about assuming, imagining, presuming, presupposing, or supposing. These are labels for made-up stuff. We could include storytelling, axioms, and “obvious,” but unprovable, facts. If facts are obvious, we can prove them. Therefore, “obvious,” but unprovable, facts are bare claims. We can call them unsupported assertions or axiomatic thinking fallacies.

We’re seeking truth. Many thinkers say assumptions get them to truth. Of course, they base their reasoning for this claim on assumptions. That means it’s circular. They assume their assumptions get them to truth.

And yet, we can think rationally. Jesus Christ is the Truth. We can base our reasoning on divine revelation. God tells us Jesus Christ is the Truth, and what He reveals is the truth.

(end quote)