Epistemology is the branch of philosophy concerned with the nature, origins, and limits of knowledge. It explores questions such as what knowledge is, how it is acquired, and how we can determine whether something is true or justified. Epistemologists examine the nature of belief, perception, reason, and evidence in order to understand how we come to know and understand the world around us. The goal of epistemology is to provide a foundation for understanding how we can be certain or justified in our beliefs.