Beliefs that individuals hold about knowledge and knowing, or what has been termed ''personal epistemology'', are related to learning and achievement in complex ways. These beliefs are also differentiated by discipline (e.g., math, science, history) as well as by judgment domains (e.g., personal taste, morality, meaning). This commentary on five articles on the domain specificity of epistemic beliefs outlines the persistent issues in this field of research, including issues of terminology, methodology, and the interrelation of domain specificity and domain generality, and provides an overview of how the authors address these concerns. Also included are directions for future research and educational implications.