[A.J.Armitage]

As it turns out on reexamination, the number is 21. The source, here, is the same one I already linked to. 19 is the number of Orthodox denominations (oops) and 13 is a typo.

(b) any reasonable final tally works for the purposes of my main argument,

Tell me, if you would, why are there pro-choice Catholics?

[Barnacle]

Tell me, if you would, why are there pro-choice Catholics?

If I may volunteer an answer; It's a statistical inevitability. Aberrations of this order are bound to occur within a sampling of any billion or so people.