My understanding is the religious claim that thier knowledge is unchanging and beyond challenge.
----------- Some do! 1870 C.E. “The First Vatican Council, which advocated the ‘infallibility’ of the pope, brought about the schism of the ‘Old Catholics.’”—La Croix (Paris daily, Catholic). Others accept what the Scriptures teach: (Romans 11:33) O the depth of God’s riches and wisdom and knowledge! How unsearchable his judgments are and beyond tracing out his ways are!