This idea led to another idea:

Over time, says Welch, “the interdisciplinary idea has evolved from a
mere critique of the disciplines to the more sophisticated and pragmatic
mission of negotiating within and beyond the epistemological frameworks
they project”. The beginnings of instrumental interdisciplinarity emerged
from the idea that truth is not established by authorities but is worked out
through the exchange of ideas.

a. That truth is relative.
b. That utter reliance on reason and empirical evidence is the way to know truth.
c. That progress can result from the interplay of ideas.

c. That progress can result from the interplay of ideas.