Absolutely false. In the 19th century, Vatican I defined more clearly than ever the conditions which must exist for papal authority to be infallible. It was not a new doctrine, however.
Memo to self: Interesting how the premise of whether Christ actually appointed Peter as the first Pope got hijack over to whether popes, in general, are infallible. Christ didn’t call Peter “The Rock.” Christ called him Cephas, a “little stone.” The “ROCK” upon which Christ said He would build his Church was the REPLY Peter gave to Christ’s question, “Whom do YOU say that I am?” And Peter replied, “I say that you are The Christ; the Son of The Living God.” And Self, don’t buy any “cut and pasted” “PROOF” scriptures that purport to “prove” that Peter was the first Pope. Scripture warns us to call no man on Earth “Father.”
Remember that, Self! Don’t you forget it!
If the person is other than the only Begotten of the Father, then he or she is fallible, by definition of being human.