Who believed that if an idea was useful it was therefore true?

Question

Quizplus · Accepted Answer

The pragmatists believed that the truth of an idea should be based on its usefulness and practicality rather than on its correspondence to objective reality. They held that an idea that works in practice and yields successful results is considered to be true. Vaihinger, on the other hand, believed that all concepts and constructs, including those of science, are mere fictions and cannot be considered as true or false, but are useful only in serving human interests. Therefore, the answer is not C or A, and it is not D because the pragmatists did believe in the usefulness of an idea for it to be considered as true.

Who Believed That If an Idea Was Useful It Was