impeccable

In Roman Catholic theology, Papal infallibility is the dogma that the Pope is preserved from error when he solemnly promulgates, or declares, to the Church a dogmatic teaching on faith or morals. This doctrine was defined dogmatically in the First Vatican Council of 1870. In Catholic theology, papal infallibility is one of the channels of the Infallibility of the Church. Papal infallibility does not signify that the Pope is impeccable, i.e., that he is specially exempt from liability to sin.