Can the Church contradict it's own teaching?

Question The Church is protected by God from making an error in teaching and basic principles, but the people running it can still mess up, just as long as this mistake doesn't go against the teaching of the Church?

Answer The Church can still sin, even against it's own teaching. It just can't teach the wrong thing. This applies to matters of 'faith and morals'- ie:, things you can't prove by science or discover on your own, like "the trinity" and "abortion is wrong". But a pope could still be evil- he could even be a murderer! But if the Pope speaks with the authority of the Church, or if all the Bishops unite in a council, they can't teach the wrong thing. (An individual bishop, ior a Pope teaching just on his own, could make a mistake. It's like the disclaimer in my blog, that what I teach may be just my ideas, and not the teachings of the Church or even OLVC. That way if I make a mistake, no one can accuse the Church of being wrong!)

Suppose there was a Pope though who wanted to undermine Catholicism, for some reason. He says he's teaching with the full authority of the Church, and he says that the Eucharist is just a symbol. Theoretically, he would die before he could teach the thing- or go mute or something. In fact, aprantly rthere was a pope who wanted to teach error, and he died suddenly. There have evem been Popes who believed error- that Jesus was not God- but for some reason they never taught it!