I really don't think that the vast majority of Catholics bother forming a position regarding transubstantiation. One of the major benefits of joining a religion is letting other people think for you.
This is probably true, but the discussion was about religion (i.e. official dogma) making predictions. Lots of holes can be picked in that, of course.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.