A missed comma here reveals that the writer is a polygamist. Proponents of the serial comma, which is the comma before “and” in “red, white, and blue,” use appositives to argue their point.

There’s a long-running debate over whether it’s proper to include that last comma in a list. Well, forget proper. The comma makes things clearer, and a recent lawsuit proves that.

When you’re writing a list, you naturally include commas to separate each item, but an Oxford comma is when you also put a comma before the “and [Final Item]”.