Not To Be Confused With
Inerrancy (no errors) is the stronger, more specific claim; infallibility (cannot fail / cannot deceive in matters of faith and practice) is often held as broader or softer. Traditions and individuals use the words with varying scope.
Inerrancy holds that when Scripture affirms something — historically, theologically, morally — it is true, rightly interpreted and according to its own intent (it speaks phenomenally of sunrise, rounds numbers, and reports without always endorsing). It is classically asserted of the autographs (the original texts), not of any one copy or translation.
The doctrine is debated in scope and definition (see the Chicago Statement, 1978); critics prefer “infallibility” as less brittle. All sides in the historic debate affirm Scripture's full authority.