Debate challenge issued today.  So far Penn has tweeted in response to friends of mine:

“I don’t have any training in debate. It’s not what I do. Dawkins or Hitchens.”

“I couldn’t get through their talking, they misrepresented things and saw things as a battle and not quest for truth.”

“I’m supposed to defend my book to any a**hole with a webcam? I haven’t time or desire.”

“Truth is not a game with challenges and macho posturing. I just tell the truth as I see it and they should do the same.”

“I’m not trained in debate. It’s turning conversation into competition. And they misrepresented me.”

“turning truth into competition is not fun for me…”