An aside about Papal infallibility as an awkward doctrine

(In about 1967, I wrote a long paper on the 1st Vatican Council and the disputes over how & whether to declare the doctrine. I got an A- on the paper, but research in an average college library didn't gain half as much material as in the above link. Even if you object to the viewpoint expressed in the article, it is well worth reading to appreciate the logical conundrums the church faced in dealing with 'practical' theology.)