4.17. How do we know Leo XIV is not the Pope?
Because he publicly adheres to the Vatican II religion, which contradicts defined Catholic dogma. For example:
He supports the false doctrine of religious liberty condemned by Popes Pius IX and Leo XIII.
He promotes ecumenism, which denies the dogma that the Catholic Church is the one true Church.
He defends and advances scandalous moral positions, such as blessing those living in grave sin.
A true pope is the visible head of the Church and must publicly profess the true Catholic faith. If he publicly defects from the faith, he cannot be pope, regardless of elections, titles, or appearances.