“Where have you been?” and Annabelle texts back “LOL at the library studying for two hours.” LOL signals basic empathy between texters, easing tension and creating a sense of equality. Instead of having a literal meaning, it does something — conveying an attitude — just like the -ed ending conveys past tense rather than “meaning” anything. LOL, of all things, is grammar.

All indications are that America’s youth are doing it quite well. Texting, far from being a scourge, is a work in progress.