Complex sentence: Kuhn's thesis is not that science is entirely relative, affixed to absolute cultural bias, yet that when scientists presume that previous scientists had laid irrefutable fundamental theory of truth, science stagnates while scientists work to justify their "interpretations" and not discover and explain.
Split into simpler sentences: Kuhn's thesis is not that science is entirely relative, affixed to absolute cultural bias. It is that when scientists presume that previous scientists had laid irrefutable fundamental theory of truth, science stagnates while scientists work to justify their "interpretations" and not discover and explain.