Answer
The Quine-Putnam indispensability argument, advanced by Willard Van Orman Quine and Hilary Putnam, posits that if a mathematical entity is indispensable to our best scientific theories, then it must exist. The argument is based on the idea that the success of a scientific theory relies on the existence of the entities it posits. Since our best scientific theories incorporate mathematical concepts, these concepts must be considered real and indispensable.