Punctuation arouses strong feelings. You have probably come across the pen-wielding vigilantes who skulk around defacing movie posters and amending handwritten signs that advertise "Rest Room's" or "Puppy's For Sale."

People fuss about punctuation not only because it clarifies meaning but also because its neglect appears to reflect wider social decline. And while the big social battles seem intractable, smaller battles over the use of the apostrophe feel like they can be won.

Yet...