When You Think You Know, But You Have No Idea, And It Has Nothing To Do With MTV Video Diaries

"I loved The DaVinci Code; I saw it with Maria and Sara last night."
"Oh, really? Tell me about it."
"Well it was good, but I didn't really understand it."
"Ok. I read the book, maybe I can help."
"What was the book about?"
"..."
"Same thing?"
"Yeah."
"Oh. What's it called?"
"The DaVinci Code."