Daniel VIctor, writing for The New York Times: A class-action lawsuit about overtime pay for truck drivers hinged entirely on a debate that has bitterly divided friends, families and foes: The dreaded -- or totally necessary -- Oxford comma, perhaps the most polarizing of punctuation marks. What ensued in the United States Court of Appeals for the First Circuit, and in a 29-page court decision handed down on Monday, was an exercise in high-stakes grammar pedantry that could cost a dairy company in Portland, Me., an estimated $10 million. In 2014, three truck drivers sued Oakhurst Dairy, seeking more than four years' worth of overtime pay that they had been denied (Editor's note: the link could be paywalled; alternate link from a syndicated partner). Maine law requires workers to be paid 1.5 times their normal rate for each hour worked after 40 hours, but it carves out some exemptions. [...] The debate over commas is often a pretty inconsequential one, but it was anything but for the truck drivers. Note the lack of Oxford comma -- also known as the serial comma -- in the following state law, which says overtime rules do not apply to: "The canning, processing, preserving, freezing, drying, marketing, storing, packing for shipment or distribution of: (1) Agricultural produce; (2) Meat and fish products; and (3) Perishable foods. Oakhurst Dairy is arguing that "packing for shipment" and "distribution" are two different items in the list. But that's not how the truck drivers are seeing it. They argue that "packing for shipment or distribution" is one item.