"Certainly, the burden of proof lies on those who deny the propositional construction of truth. Their burden is twofold. Not only must they give evidence for the existence of such truth, but first of all they must make clear what they mean by their words. It may be that the phrase nonpropositional truth is a phrase without meaning." -- Dr. Gordon H. Clark
The original article was published here: Gordon H. Clark, "The Bible As Truth," Bibliotheca Sacra 114.454 (April-June 1957): 157-170.