This book examines how the semantics and metaphysics of disagreement affect the epistemology of disagreement. It thus broadens the philosophical discourse by relating the epistemological discussion of (peer) disagreement to inquiries into the nature of disagreement and disagreeing. By doing this, it paints a new picture of the epistemological situation evoked by disagreement: To the same extent that an interpersonal dispute undermines the justification of the disputing persons’ beliefs, it also presents an obstacle to interpersonal understanding. This follows from the nature of...