infallibility

The quality of being infallible, or incapable of error or mistake; entire exemption from liability to error.

Incapability of failure; absolute certainty of success or effect: as, the infallibility of a remedy.

The quality or state of being infallible, or exempt from error; inerrability.

the dogma that the pope can not, when acting in his official character of supreme pontiff, err in defining a doctrine of Christian faith or rule of morals, to be held by the church. This was decreed by the Ecumenical Council at the Vatican, July 18, 1870.

The property of being infallible; the ability to never make a mistake.

the quality of never making an error