Statistically, the smartest human being who ever lived probably couldn’t read. Anatomically modern humans appeared about 200,000 years ago, meaning that for 95% of human history, written language didn’t even exist. The smartest human might easily have been born before spoken language. Perhaps she died of cholera in the 18th century, when the most brilliant minds of the western hemisphere agreed on the miasma theory of disease. Or maybe she lived in Kansas circa 1906, when only 6 percent of Americans graduated from high school. Perhaps she made terrible decisions about her life, routinely burned her hand while cooking, tripped over the threshold on her way out the door each morning and was just preternaturally good at playing the harpsichord. Today is Friday, and “smart” is a term so vague and relative as to bear no meaning. Won’t you look out for what’s dumb with me?