The term "existing knowledge base" refers to a collection or body of information that is currently known and accepted within a particular field, discipline or subject area. This includes facts, theories, concepts, principles, methods, techniques, practices, and any other relevant data that has been accumulated through research, observation, experience, and learning over time. The existing knowledge base serves as the foundation for further inquiry, investigation, analysis, and innovation in a given field or discipline. It provides a starting point from which new ideas can be generated, tested, refined, and added to the body of knowledge, thereby expanding our understanding and increasing our ability to solve problems, make decisions, and take action based on what we know.