Instrumentalism is a philosophical approach that emphasizes the practical utility of theories and concepts rather than their truth or correspondence to reality. It suggests that scientific theories are tools or instruments for predicting and controlling phenomena, rather than definitive explanations of the underlying nature of the world. This perspective is often associated with the work of philosophers like John Dewey and Willard Van Orman Quine. In instrumentalism, the value of a theory is measured by its effectiveness in solving problems and achieving desired outcomes. This means that theories can be accepted or rejected based on their usefulness, rather than their ability to accurately describe reality. This approach is commonly applied in fields such as science, economics, and social sciences.