Finding your way to the truth is the informal job of the 21st-century citizen. All of us. Unless you want to be manipulated, you need some check on the claims you hear uttered by powerful people or repeated, innocently or not, by others. For a few thousand people in this era, correcting the record is a profession, even a calling, and today’s guest was one of the first and maybe its most famous practitioner. He’s Glenn Kessler, better known as the creator of the Washingon Post’s Fact Ch...