A better definition is given by Stewart Custer in Does Inspiration Demand Inerrancy? Inerrancy is that characteristic of Scripture which renders it without mistake AND THEREFORE INFALLIBLE, not just in religious matters, but also in matters of historic and scientific fact.
They way to coneptualize this is as below:
INSPIRED -----> INERRANT----->INFALLIBLE
The fact of the matter is that a large number of so-called Evangelicals have rejected inerrancy, therefore infallibility. For proof study The Battle for the Bible and The Bible in the Balance, both written by evangelical writer Harold Lindsell many years ago.
According to dictionary definitions, inerrancy means infallibility:
Harold Lindsell, one of my previous professors, raised the issue that was happening with the downgrade of inerrancy, particularly in Southern Baptist circles, in his 1976 book.
The Battle for the Bible. Perhaps the most helpful exposition I have read is by Norman L Geisler (ed) 1979.
Inerrancy. Grand Rapids, Michigan: Zondervan Publishing House.
My own understanding in affirming inerrancy is that the Bible is without error in all that it affirms in the original manuscripts (autographa). It naturally flows from an understanding of the Greek
theopneustos (God-breathed), 2 Tim 3:16 (ESV), and the perfection of God. How is it possible for a God-breathed book to include error when he is Perfect?
The only Bible books that are NOT God-breathed are the translations. They are imperfect because of the transcribing process.
People commonly say to me: But we don’t have the originals so it is pointless to talk about the inerrancy of documents we do not have. Do you think so? I have found R. Laird Harris’s explanation helpful in explaining the need to have authoritative original documents behind the copies, even though we currently do not have access to the originals (autographa). He wrote:
“Reflection will show that the doctrine of verbal inspiration is worthwhile even though the originals have perished. An illustration may be helpful. Suppose we wish to measure the length of a certain pencil. With a tape measure we measure it as 6 1/2 inches. A more carefully made office ruler indicates 6 9/16 inches. Checking with an engineer’s scale, we find it to be slightly more than 6.58 inches. Careful measurement with a steel scale under laboratory conditions reveals it to be 6.577 inches. Not satisfied still, we send the pencil to Washington, where master gauges indicate a length of 6.5774 inches. The master gauges themselves are checked against the standard United States yard marked on platinum bar preserved in Washington. Now, suppose that we should read in the newspapers that a clever criminal had run off with the platinum bar and melted it down for the precious metal. As a matter of fact, this once happened to Britain’s standard yard! What difference would this make to us? Very little. None of us has ever seen the platinum bar. Many of us perhaps never realized it existed. Yet we blithely use tape measures, rulers, scales, and similar measuring devices. These approximate measures derive their value from their being dependent on more accurate gauges. But even the approximate has tremendous value—if it has had a true standard behind it” (Harris 1969:88-89).
Works consulted
Harris, R. L. 1957, 1969.
Inspiration and Canonicity of the Bible. Grand Rapids, Michigan: Zondervan Publishing House.
Oz