LOT Polish Airlines Flight 5055 accident's cause was similar to that of LOT Polish Airlines Flight 007's crash seven years earlier. After the disaster of Flight 007, the Polish investigatory commission established that its engine shaft disintegration was the result of metal fatigue; improper alloy preparation resulting in a defective mechanism which was less resistant to fatigue; and a faulty design of the engine shaft. Detection of these faults was possible only after complete disassembly of the engine and detailed analysis of all its elements, and as such was beyond the capabilities of aircraft maintenance personnel. These concerns were addressed by the Polish Government's Special
The Purloined Letter theorists in the 1960s and 1970s. Jacques Lacan argued in "Ecrits" that the content of the Queen's letter is irrelevant to the story and that the proper "place" of the signifier (the letter itself) is determined by the symbolic structure in which it exists and is displaced, first by the Minister and then by Dupin. Jacques Derrida responded to Lacan's reading in ""Le Facteur de la vérité"" ("The Purveyor of Truth"), pointing out what Lacan "missed" and suggesting that it is not that the letter lacks meaning, as Lacan claimed, but that Lacan made the lack the meaning. The truth,