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

The quality of never misleading or deceiving. The Bible possesses this quality because it is inspired by God, who cannot lie (Titus 1:2).

perfect, incapable of error. In the case of the Roman Catholic Church, they claim that the pope is infallible on points of doctrine and faith when acting in official capacity. Protestants don't believe this, but trust only in the Word of God, the Bible. This debate stems from the Roman Catholic interpretation of Matthew 16:17-19, believing that Jesus created the papacy when He told Peter that he had the keys to the kingdom of heaven.