piusv:
ex cathedra is just a metaphor meaning from the Chair of Saint Peter and the authority of the Church of Rome. So in substance, the Pope teaches “ex cathedra” through several means. For example, the Pope teaches infallibly thru a Papal Statement issued via a Apostolic Constitution or Papal Encyclical, both of which could be issued thru a Papal Bull which is the most formal way of issueing a Letter [for it has the Current Pope’s seal on it and the Seals of SS Peter and Paul on the other side]. A Church Council is obviously another way and expresses what I guess is called a Supreme Act of the Magisterium.
So? That doesn’t change the fact that Catholics who think that only “ex cathedra” Papal Statements are infallible are wrong.