Although I have some expertise with servicing the sorts of equipment that produced documents back in the 1970s, having serviced copy machines, typewriters, and later on, early word processing systems, I thought the best person to contact regarding the authenticity of the alleged Texas Air National Guard memoranda would be someone who has made a career of producing documents that aren’t real but look it. So I downloaded the scanned images of the memoranda ostensibly written by President Bush’s old National Guard supervising officer, and took the printouts to a friend we’ll call Bernie, who works in, well, a place...