What can we actually know? It’s a question that sounds simple until you try to answer it. You believe, right now, that you’re reading these words—but how do you know you’re not dreaming, or that your senses aren’t deceiving you in some more subtle way? Epistemology, the philosophical study of knowledge, takes questions like this seriously. It asks not just what we know, but how we know it, what separates genuine knowledge from mere opinion or lucky guesswork, and whether certainty is something we can ever really achieve. These might seem like abstract puzzles fit only for philosophers in armchairs, but they touch everything: how we evaluate news and evidence, how science justifies its claims, how we decide who to trust, and how we live with the fact that we’re often wrong. This booklet is an invitation to think carefully about thinking itself—to examine the foundations beneath our everyday confidence that we know things at all.
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OWEN ANDERSON is a tenured full professor at Arizona State University and the pastor of Christ the King Reformed Presbyterian Church in Phoenix, Arizona (ctkaz. org). He has authored numerous books on the philosophy of religion, natural theology, and natural law, including works published by Cambridge University Press. His writing and teaching focus on the clarity of God’s existence, the relationship between reason and revelation, and the foundations of Christian philosophy. He also writes for a broader public audience at The Blaze, makes videos with PragerU, and brings philosophical and theological clarity to contemporary debates in the university and culture.
