‘Common sense’ tell us many correct things about dietary choices (variety is good, fresh is good) – and many incorrect things (sugar causes hyperactivity, you must drink masses of water every day).  This article on the Salem Witch Trials was a surprising find in the Foodie section of the SFWeekly – and briefly touches upon how a dietary issue might have caused an important historical set of events and left a cultural scar that has lasted for hundreds of years.