A man walked into a game and toy store looking for a challenging board puzzle so he asked the clerk for just such a puzzle. The clerk replied, "Well sir, it depends on what you consider to be challenging?"
The man replied, "What do you mean it depends on me, I didn't make the puzzle so how am I supposed to know if it's challenging? Don't you know your products young man?"
The clerk replied, "Well sir, it tells you on the box how complex the puzzle is. Lets see here, oh yes, this one should be perfect. Right here on the front of the box it says it takes 3-4 ages to complete."