Whenever reality is inconvenient or difficult to accept, it is now commonplace to dispute it, to pronounce it false and align oneself quickly with the Truth, while concealing the sense of unreality and false perception this process implies. Rereading Freud’s letter to Romain Rolland, in 1936, “A Disturbance of Memory on the Acropolis,” with a focus on the sense of falseness, allows us to explore the characteristics of a psyche that is under the sway of post-traumatic denial, based on the construction of a false internal self. Hypotheses are formulated regarding the question of sibling relationships, which is central to this “letter to a brother,” leading eventually to an interpretation involving the unrepresentable archaic, extending Freud’s theorization around the father complex. If the belief today is that “nothing is true, therefore anything goes,” it is because sibling rivalry has been reduced to a trivialized murder.