Actually, in fact, for a certainty....everyone must determine for themselves what is and is not true. Non-Catholics choose to trust in their own faculties and fallible cognitive abilities, whereas Catholics choose to trust in the Magisterium of the Church preserved from error by the Paraclete. Again, I am not here to convince or convert you nor am I here to debate.
Actually; we are convinced by what SCRIPTURE has given us:
NIV 2 Corinthians 1:13-14
For we do not write you anything you cannot read or understand. And I hope that, as you have understood us in part, you will come to understand fully that you can boast of us just as we will boast of you in the day of the Lord Jesus.
Iffn y'all wanna take the word of a committee; fine.
I seem to remember that a committee chooses the pope...
Pope Stephen VI (896–897), who had his predecessor Pope Formosus exhumed, tried, de-fingered, briefly reburied, and thrown in the Tiber.[1]
Pope John XII (955–964), who gave land to a mistress, murdered several people, and was killed by a man who caught him in bed with his wife.
Pope Benedict IX (1032–1044, 1045, 1047–1048), who "sold" the Papacy
Pope Boniface VIII (1294–1303), who is lampooned in Dante's Divine Comedy
Pope Urban VI (1378–1389), who complained that he did not hear enough screaming when Cardinals who had conspired against him were tortured.[2]
Pope Alexander VI (1492–1503), a Borgia, who was guilty of nepotism and whose unattended corpse swelled until it could barely fit in a coffin.[3]
Pope Leo X (1513–1521), a spendthrift member of the Medici family who once spent 1/7 of his predecessors' reserves on a single ceremony[4]
Pope Clement VII (1523–1534), also a Medici, whose power-politicking with France, Spain, and Germany got Rome sacked.