Thanks for pinging me to this but I find these becomes circular arguments.
1) The Pope is the head of the Church;
2) The Church is Christianity;
3) Therefore the Pope is head of all Christians.
While this is flawed reasoning (premise 2 is only partially correct) you'll never get the Catholics to admit it. After all, this is what the Vatican says.
You are exactly correct.
2) The Church is Christianity;
3) Therefore the Pope is head of all Christians.
While this is flawed reasoning (premise 2 is only partially correct) you'll never get the Catholics to admit it.
I wish you guys could speak English. Disagreeing with the truth value of a premise is a completely separate matter from whether or not the logical chain is valid or flawed. This chain displays a major premise, a minor premise and the conclusion follows directly from the major and the minor. In fact, this isn't "flawed reasoning," it is logically impeccable.
Now, you might quarrel with the truth values of the premises, but that is an issue completely separate from the validity of the logical reasoning displayed. The reasoning above is not flawed, it is perfect, as even a glance at any textbook on logic will easily corroborate.
As for who asserts it, that would be God's Word, Holy Scripture, as the website http://bridegroompress.com/sc/index.htm demonstrates. But, since you guys don't read English and you confuse validity with premise values, this is all over your heads.