Because I've never read anything about the fullness of means though the the Catholic in the Bible. The does say nothing should be added to it or subtract to it which means it is the complete Word of God.

The Spanish Inquisition was state lead by the Spanish Monarchy, with Pope Sixtus IV granting them the authority to appoint inquisitors for tribunals. In no way were their actions Catholic doctrine. This is another instance of confusion between individual fallibility and the infallible Institution which is the Catholic Church.

Tetzel’s individual practice of selling indulgences was never doctrine, making that point null. Again, we must seperate the individual from the Institution.. Additionally, The Council of Trent officially banned this practice in the middle 1500’s.

I will continue to defend Mother Church as infallible. The actions of sinful Catholics who act in a corrupt manner individually cannot refute this fact.

The term “Catholic Church” does not need to be explicitly named in the Bible for us to understand that it was the Church Christ instituted and willed all his flock to be member of.