Why commas count

Sent by a friend: It seems that Dunn Lumber (ten locations in the Puget Sound area) is famous for posting such thought-provoking, mind-bending messages on the sign outside its store. I know:  Eats, Shoots & Leaves: The Zero Tolerance Approach to Punctuation. For the record, I am a strong advocate of the Oxford / Harvard / series / serial comma, […]