I noticed when the witnesses are stumped..they change the bible subject..which is what she did. She got called on the Child abuse in the congregations and she responds with the YHWH issue?
She barely mentioned the child abuse issue. I would continue on the same lines and not talk about anything else..flood her with actual accounts of abuse in the congregations and stick with that for now.
It doesn't have anything to do with how all the congregations have the same talk on the same day..or how united they are in their beliefs..(that's another story).
Always go back to the child abuse issue..then when that has been covered to show the extent of abuse that is going on in the religion and the poor way the problem is being handled....only then would I move on to another subject...nothing gets accomplished otherwise.
It would mean doing research on his part but the computer offers plenty of information!
Snoozy...(Patting your son on the back)