[johnb2004]

Does that mean if most theologians think contraception is not a grave sin, it is not sinful? Do you know of any authentic magisterial documents that prove your point?

The newadvent site claims there are some who hold that beatification is infallible.

[Fifthmark]

One of the requirements for a papal teaching to be infallible is the intent to bind upon the entire Church (see Vatican I, Papal Infallibility). This is typically not met with beatifications, which grant worship to certain people or places and do not extend the cult to the entire Church. Therefore, beatifications are not infallible.