The term "theoretical" refers to concepts or ideas that are based on theory rather than practical application. It often involves abstract reasoning and models that explain phenomena without necessarily being tested in real-world situations. For example, in physics, theoretical frameworks help scientists understand the fundamental laws governing the universe. In various fields, such as mathematics and philosophy, theoretical approaches are essential for developing new ideas and hypotheses. These theories can later be tested through experiments or observations, leading to practical applications. However, theoretical work is crucial for advancing knowledge and guiding future research directions.