I was recently privileged to be interviewed for a very good article on Infallibility by Kristen Moulton of the Salt Lake Tribune. The end result was very good. You can read the whole article here.
Interestingly, it was published side-by-side with an article explaining Mormons and their view of infallibility with their Mormon prophets. Their concept is poorly thought out and fallible (pun intended). You can read that here.
After reading them both you will be glad to be Catholic.