Not really had the chance to, I forced it at our last meeting by tacking it on out of the blue as they were about to leave.
I just didnt want it left in the air, but I think they just want to avoid thinking about anything or talking about anything that may upset their world view. Here's the gist of it:
I said "you are going to hate me for bringing this up, but ...... you do know what a coregent is dont you?"
Him (+wife) "yes, two kings ruling together"
Me " so if someone is coregent for 10 years and then king for 45 years how many years has he reigned for 45 or 55?"
Them - blank stares, wondering wtf am i on about, " 45 years" seem very unsure so i repeat the question again
Them - similar answers, wife contadicts him.
Me " They are both correct answers as it depends on the context, it's true to say he ruled 45 or 55 years ... you didnt bother to look it up did you when you read that book, I just wanted you to know."
This was one of the points he made a postit note of in my book, the book said one figure the insight book said the other, but he hadnt bothered to ask why the difference. I wanted him to know that both are correct, not either / or.
Wife gets sarcastic saying "Ooookaaaay" probably because she doesnt even know why I even brought it up, my brother knows why and remains quiet.
They leave. I know I am losing them to mind control.