Who’d’ve thunk it? Noam Chomsky, academic-left theoretician and author of obscure incendiary anti-Bush tracts, has become a famous enough name, at least in this town, to become an ad slogan for a regional chain of seven bookstores.

You know you’re a word-usage freak when this sign makes you stop and think not about its message, but about whether it should say “1 in 7 is” or “1 in 7 are.”

Above and below, anonymous sidewalk chalk art found downtown.