Wow. I have to wonder what the spin will be on this one. I would be torn. Do I go and let him twist the event to his own advantage? Or do I decline and let him publicly say "they wouldn't play nice, look we even invited them for 'dialogue'!"
I guess if I could have a recording team there to record the meeting, I would be OK with it. Then nothing could be edited for slant/spin purposes without it being exposed by the opposing team.
I think they all should go as a group together.
Then again, Rick can read their Scriptural criticism for himself and learn all he needs to know. There is nothing they would tell him differently in person than they have already in their writings. Face to face only serves to disarm by helping everyone know he's a 'nice guy.' Well, frankly we already all admit Rick is a nice charming fellow in person. That is completely beside the point.
So anyway it will be interesting to see if anything comes of this. I say go. Take copious notes on the stuff presented at the seminar, and openly record the meeting with Rick.