Difficult perhaps, but not impenetrable.
It wouldn't be so difficult if not for how this issue has been treated and made to be complex in the past.
I am not the one responsible for having made things so complicated.
But I have shown how many of your own more simple statements pertaining to the subject at hand failed to be in any way categorically defining.
In other words -- your statements were far from being entirely accurate.
One may parrot some version or another of 'party line' Roman Catholic apologetic. But that doesn't make it true.
It seems to me that you have been ranting about whatever you don’t like about the Papacy, the behavior of Popes, etc., etc. What I have found impossible to discover from your rants is: What do you understand to be the dogma of Papal Infallibility?
So why not start here:
What were the words used by Vatican I when it stated the dogma of Papal Infallibility?