Today, the Friday Know-It-All welcomes guest writer Andy Sturdevant, proprietor of a fantastic biweekly mail subscription service for fans of pen-and-paper games called Paper Palace. Each edition of Paper Palace features an entertaining dive into the rules and history of a different pen-and-paper game, as well as a short essay about Andy’s own relationship to the game and experiences playing it. This week, we’re re-running one of my personal favorite installments of Paper Palace, devoted to the playground divination game MASH.