instrumentalism

noun Philosophy.

1. the variety of pragmatism developed by John Dewey, maintaining that the truth of an idea is determined by its success in the active solution of a problem and that the value of ideas is determined by their function in human experience.

noun

1. a system of pragmatic philosophy holding that ideas are instruments, that they should guide our actions and can change the world, and that their value consists not in their truth but in their success
2. an antirealist philosophy of science that holds that theories are not true or false but are merely tools for deriving predictions from observational data