PROVE v.
To evince, establish, or ascertain, as truth, reality, or fact, by argument, testimony, or other evidence. They have inferred much from slender premises, and conjectured when they could not prove. J. H. Newman.
REASON n.
ntuitional faculty. Specifically, it is the intuitional faculty, or the faculty of first truths, as distinguished from the understanding, which is called the discursive or ratiocinative faculty. We have no other faculties of perceiving or knowing anything divine or human, but by our five senses and our reason. P. Brown…