By 1952, presuppositional apologetics had acquired a new advocate in the Presbyterian theologian Gordon Clark. He embraced the label "presuppositional" since his approach to apologetics, emphasizing the priority of epistemology and an axiom of revelation, was more closely concerned with the logical order of assumptions than was Van Til. The differences between the two views on presuppositionalism, though few in number, caused a significant rift between the two men, and even after both Clark and Van Til had died, John Robbins (a theologian and former student of Clark's) and Bahnsen were often involved in heated exchanges.