Theoretical epistemology is a branch of philosophy that studies the nature, scope, and limits of knowledge. It seeks to understand how we acquire knowledge, what justifies our beliefs, and the distinction between true knowledge and mere opinion. This field examines concepts such as justification, belief, and truth to explore how we come to know what we know. In theoretical epistemology, philosophers analyze different sources of knowledge, including perception, reason, and testimony. They also investigate various theories of knowledge, such as empiricism and rationalism, to determine how these approaches contribute to our understanding of the world. This discipline plays a crucial role in shaping our comprehension of knowledge itself.