- If the Church were infallible, nothing in the Church would ever change.
- Many things have changed in the Church.
- Therefore, the Church is not infallible.
Every change made by the Council and by the pope and bishops after Vatican Council II has been a change in discipline, not in dogma.
Hans Küng would never accept election as pope, because then he would no longer be infallible.
Catechism of the Catholic Church
1: Paragraph # 2051
1 The infallibility of the Magisterium of the Pastors extends to all the elements of doctrine, including moral doctrine, without which the saving truths of the faith cannot be ...
2: Paragraph # 891
the college of bishops, enjoys this infallibility in virtue of his office, when, as ... The infallibility promised to the Church is also present in the body of bishops when, ...
3: Paragraph # 2035
of participation in the authority of Christ is ensured by the charism of infallibility. This infallibility extends as far as does the deposit of divine Revelation; it also extends ...
4: Paragraph # 889
the apostles, Christ who is the Truth willed to confer on her a share in his own infallibility. By a "supernatural sense of faith" the People of God, under the guidance of the ...
5: Paragraph # 890
To fulfill this service, Christ endowed the Church's shepherds with the charism of infallibility in matters of faith and morals. The exercise of this charism takes several forms: