the catholic church has never contradicted itself

My opponent made the claim that the RCC had no contradictions in its entire history. It was upon myself to show these contradictions and my opponent must depose of them. I think my opponent has failed to do that. NOTE: All I need is one contradiction to win this debate. Let's recap the entire debate: My opponent said that I must show Papal statements, RCC council documented errors or contradiction. This is difficult to do without any source to go by, so, I have entered the Holy Bible as that source. The RCC have many contradictions when compared to the Bible and I offered just a few. A. Denials of Biblical teachings or tradition I offered the contradiction that RCC recognizes Peter as the Rock on which the church of Christ was to be built shown in Catechism of the Catholic Church, #552. I offered a verse from Peter and also Jesus himself to show that Peter is not the rock of the Church but instead Jesus Christ is. This is a huge error of scripture and can have many negative effects with doctrine if one were to view Peter as the 'rock' of the Church instead of Christ. My opponent offered us no clear-cut explanation for this. I further offered the contention that the RCC refuses that Paul was ordained to teach the Gentiles. Though the RCC chooses to take Peter as their teacher. There was no rebuttal for this. B. Idolatry I showed that in EX. 20:4 the Bible tells us not to worship idols or anything other than God. I showed how the RCC has changed these specific verses on Idolatry for convenience. My opponent make claims that the RCC merely arranges them differently but ignores that they take the 2nd out completely and use the 10th as nine and ten. She even mentions she only thinks they did not exclude one but she must have not checked or she would see that the RCC's and Bible are very different. I showed that Mary is considered in RCC writings as without 'sin.' I gave scripture saying the very opposite. My opponent suggested twice that Jesus was without sin and the Bible said everyone has sin. Well she just made my point by that statement and also made a statement that appears to say that the Bible is untrue. To rebut my opponent on that statement I will say that Jesus is God and therefore is not considered as everyone else or humans. I went further and showed that Jesus had siblings which the RCC says He does not. I gave a actual verse that says Mary had children other than Christ and it says that they are Christ's brothers and sisters by Mary. She never gives us any adequate explanation for this. My opponent says my argument is weak but not one of them are answered with any substance but left to doubt just off assumption because the RCC says so. C. Modern Contradictions I showed that Jesus himself said that traditions that are not by scripture have no authority from God. All the evidences above and many more show the non-scripture tradition of the RCC. I also showed that even Popes have different points of view that contradict each other. Conclusion: My opponent has failed to argue her case properly. She basically ignored most of my contentions and shrugged them off as assumptions. I showed the actual Catechism of the RCC and how it contradicts actual Biblical doctrine. Please vote for Con. Thanks to my opponent!