Inerrancy is the view that when all the facts become known, they will demonstrate that the Bible in its original autographs and correctly interpreted is entirely true and never false in all it affirms, whether that relates to doctrine or ethics or to the social, physical, or life sciences.
Probably the most important aspect of this definition is its definition of inerrancy in terms of truth and falsity rather than in terms of error. It has been far more common to define inerrancy as “without error,” but a number of reasons argue for relating inerrancy to truth and falsity.
From the article Inerrancy and Infallibility of the Bible