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

Though thinkers make many claims, they only offer two kinds of proof for their claims. They can’t claim anything about ancient history, truth, goodness, or evil without either assumption or divine revelation. Ungodly thinkers choose assumptions over divine revelation. Secular science also depends on assumptions since it refuses to acknowledge God’s revelation. Notably, secularists even rely on assumptions for basics like the following:

• The laws of nature
• The regularity of nature
• The validity of logic and reason
• The validity of math
• The validity of observation
• The actual existence of reality

And when they don’t assume these truths, they drift into skepticism where science becomes impossible. Besides making science impossible, in this state of skepticism, it makes no sense to try to reason. And yet, disbelievers constantly try to reason from vapor. They argue about everything. They know they’re just making up stuff, but they think their made-up stuff is true because they pulled it from their worldviews. And those worldviews are deceptive because they seem real.

Since God reveals the validity of natural laws, logic, and math, God shows us we can observe Christians know all these basic truths by revelation. He reveals the actual existence of reality. Though He reveals these things to every person, ungodly thinkers refuse to acknowledge the source of the revelation. Instead, they attribute the revealed knowledge to human intelligence rather than attributing it to God.

(end quote)