instrumentalism
Noun
Meaning
a system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their success
Source: WordNetHypernyms
Examples
He strongly disagreed with Niels Bohr 's instrumentalism and supported Albert Einstein 's realist approach to scientific theories about the universe.
However, the loss of determinism for the sake of instrumentalism did not meet with universal approval.