i am orthodox and personally i have never heard of this papal infallibility been used in the church or dogmata.

Devout Catholics tend to believe in the infallibility of the Pope.

Papal infallibility in Church teaching is similar to a "Circular Reference" in a spreadsheet.

Joseph Fessler has written:

'Die Revision des Concordates' -- subject(s): Church and state, Catholic Church, Concordat of 1855 (Austria)

'The true and false infallibility of the popes' -- subject(s): Infallibility, Popes

He didn't. The church remained the same with the same churches and clergy. The only difference was that the church refused to accept the infallibility of the Pope.

The pope teaches the Church in matters of faith and morals with a charism of infallibility, so long as he teaches "ex cathedra," that is, so long as he is teaching in his official capacity as the head of the Church.

Infallibility aside, the pope teaches the Church by giving addresses to audiences in the Vatican City, by writing encylicals, apostolic constitutions, and motu proprios.