The theory of knowledge, often referred to as epistemology, is a branch of philosophy that explores the nature, sources, and limits of knowledge. It examines questions such as what knowledge is, how it is acquired, and how we can differentiate between true knowledge and belief. In the context of education, particularly in the International Baccalaureate (IB) program, the theory of knowledge course encourages students to reflect on their own understanding and the ways in which knowledge is constructed. It emphasizes critical thinking and the importance of questioning the validity of information across different areas of knowledge.