President Obama repeatedly sought to paint Governor Mitt Romney as a man stuck in the past at this week’s foreign policy debate. One instance was when the president tried to highlight Romney’s supposedly outdated understanding of how the military works. Mr. Obama implied that simple numerical comparisons of US forces are silly, like a game of Battleship, versus serious examination of overall capabilities. Romney could have jumped in and asked why then some US Army aging networks are closer to Atari than the iPhone. But that would have only further detracted from a serious and legitimate discussion on substance.