You need movie facts and you need them now. Otherwise you won’t win the argument. There’s an app for that. The Internet Movie Database now has it’s own iPhone app. It’s the same stuff that’s on the site, but in a neatly-designed and easy to use reference for just about every film or show. You’ll also get local showtimes, trailers, and TV listings.
However you can’t rate or review movies, and do the other stuff that you can with an account. But it’s all good because it’s free.