To put a wooden stake in the heart of the vampire that is the IBM Selectric Composer typewriter theory, we've put-together a few graphics to illustrate one of the many reasons why this particular unit could not have produced any of the suspect CBS memos. On an IBM Selectric Composer typewriter, all characters - regardless of font or point size - have fixed "unit values" assigned to them. This means that, while the actual physical space taken-up by a character will change with font and point size, the relationships between characters within that given font and point size are always...