Yes you are both technically correct, it does not offer a cast iron analogy of the offside rule, I am sorry. It was simply a humerous spin on the off side I pulled off the internet.

Just in case there is any further confusion and to avoid any possible insinuation that it isnt accurate, here is the official Laws Of The Game document from Fifa which has a Flash Based demonstration of Chapter 11, the Offside Law:

http://www.fifa.com/worldfootball/lawsofthegame.html

The document is a bit bigger at 140 pages but will give you the complete description you are seeking.