One of the greatest reasons to play a game on Facebook, the irreverent video game quiz show You Don't Know Jack expands to iOS and Android on Thursday, and once you've gone mobile Jack there's no going back.

Now here's an adorable story.

I've got a perhaps irrational fondness for trivia games. It's easy to like the genre when your brain is filled up with seemingly disconnected facts; trivia games give them a place to go. A tiny little factlet purpose in life.

The company behind one of gaming's most famous trivia series are suing the people behind insurance's most famous duck, as You Don't Know Jack makers Jellyvision have filed a trademark infringement suit against Aflac.