Evangelicals believe that the Bible alone is infallible or inerrant. It says nothing about scripture being "perfect", or "inerrant", or "infallible", or "all-sufficient". These oracles are deemed to be infallible. The Catholic Church bases all of its infallible teachings on sacred tradition and sacred scripture. They believe the Vedas is an infallible authority. Therefore, Mill concludes that suppression of opinion based on belief in infallible doctrine is dangerous. There is no complete list of papal statements considered infallible. The Pope being the first among equals, but not infallible and not with absolute authority. He believed in the infallible authority of the Vedas. He was a sannyasin (ascetic) who believed in the infallible authority of the Vedas. Evangelical Friends regard the Bible as the infallible and self-authenticating Word of God. Dickens also rejected the Evangelical conviction that the Bible was the infallible word of God. Therefore, each statement considered derived from an infallible God cannot be criticized by humans. The Westinghouse air brake system is very trustworthy, but not infallible. Davis also expressed her view that the Bible is infallible.