[NYer]

We both agreed to research the question more. If anyone has authoritative insight or resources to help us decide this question, we'd be grateful.

Perhaps this provides some insight.

However, what’s less well known is that an official proclamation from the Pope isn’t the only way for the Catholic church to issue an infallible teaching. If all bishops throughout the world at any given time agree on a particular belief, then that belief is considered to automatically be infallibly true and dogmatically binding on all Catholics present and future. The church calls this the “ordinary and universal magisterium”. Pope John Paul II, for example, explicitly stated that the prohibition on women priests is a permanent and infallible part of Catholic faith because of this doctrine.

Read More

The odds of that happening at this synod are comparable to those of an asteroid making a direct hit on the White House.

[piusv]

That is helpful. Thank you. However, it also states the following:

If I understand the principle, the dissent of even one bishop would render this null and void as a church doctrine

It doesn't look like this Synod involves all bishops; however, if no bishop throughout the Church dissents from its conclusions, I still wonder whether it would be considered part of the OM.

[BlatherNaut]

If all bishops throughout the world at any given time agree on a particular belief, then that belief is considered to automatically be infallibly true and dogmatically binding on all Catholics present and future.

E.g. the indissolubility of marriage, binding despite the "serene theology" put forth by Cdl. Kasper.