Infallibility

[Sarah]

The quality or state of being infallible, or exempt from error;inerrability.Infallibility is the highest perfection of the knowing faculty.Tillotson.Papal infallibility (R. C. Ch.), the dogma that the pope can not,when acting in his official character of supreme pontiff, err indefining a doctrine of Christian faith or rule of morals, to be heldby the church. This was decreed by the Ecumenical Council at theVatican, July 18, 1870.

[Agnes]

the fact of never being wrong, failing, or making a mistake: