[donmeaker]

Or heretics, since the Pope, speaking ex cathedra, has assented to the modern view...

[terycarl]

Or heretics, since the Pope, speaking ex cathedra, has assented to the modern view...

wrong

[ebb tide]

No pope has spoken ex cathedra on a matter of faith and morals to the Universal (Catholic) Church since prior to the Second Vatican Council. In other words, no pope has spoken infallibly in that time frame. So drop your strawman; it’s tiresome.