Epistemology is the area of philosophy that examines the phenomena of and related to knowledge. Traditional core questions include: How is knowledge different from lucky guessing? Can knowledge be innate? Is skepticism a threat, and if so, how should it be countered? And: Is it possible to know something simply on the basis of another person’s say-so? In the background of all of these traditional questions is a broad concern thats not often explicitly addressed—the concern is with ignorance. We study the nature of knowledge so that we might better overcome ignorance. And yet ignorance is not often an explicit object of examination. In Understanding Ignorance: The Surprising Impact of What We Don’t Know (The MIT Press, 2017), Daniel DeNicola makes the case for placing ignorance at the center of epistemology. He argues that ignorance is not univocal; it comes in many forms, and the different forms need to be addressed in different ways.