Here's the train of thought:

ecumenical councils where a pope presides with bishops are infallible (something of what you are saying);

Vatican 2 appears to be such a council but also taught error contrary to teachings of infallibility (seemingly impossible);

The only proposition we can think of as to how Catholicism can be consistent without falling in to contraction with the above facts then, would be to conclude that such a "pope" that taught error could not have been a pope in the first place, but was an heretic who then taught those heresies in a false council

(There are some other arguments about popes who can fall in to error or heresy but they are more speculative)

Thus the OP document about AI we wouldn't expect to be reliable from a Catholic standpoint and it goes out of its way to make all kinds of statements not related to AI which we are also critiquing here in this comment chain