Have you heard of the Oxford comma? It's that little mark that makes the difference between (for instance), 'Mary, a cow and a friend' and 'Mary, a cow, and a friend'. See how in the former sentence your friend Mary becomes a bovine as there is no third comma? When David Webbert of Johnson, Webbert & Young LLP spotted a comma missing from a list of activities exempt from overtime pay, it became a millions dollar winning case...