The Posen speeches made by Heinrich Himmler in October 1943 are the first known documents in which a high-ranking member of the Nazi government spoke explicitly about the perpetration of the Holocaust during the war. Himmler mentions the or 'evacuation of the Jews', which he uses synonymously with their extermination. At one point in the speech, Himmler says: "elimination of the Jews, extermination, we're doing it", briefly pausing in the middle of "elimination" () before going on to say "extermination" (). His hesitation in the middle of saying "elimination" can be considered as a quick mental check to see whether or not it would have been acceptable to use such words in front of his given audience; however, as the speech was given to the seniority of the SS in private, such language would have been acceptable to use. This has been compared to another incident of self-verification in the opposite way, where Josef Goebbels, in his Total War speech on February 18, 1943, begins to say ('extermination of Jewry') but switches to saying , bearing in mind that he is speaking very publicly. His resulting phrasing is , which can be likened to "exterm... elimination" in English.
