There is no explanation for the fact you weren't there because you had no choice of not being there. You stepped into this world of abstract regulations and abstract living conditions and you were confined and obliged to not stop doing this until further notice. You cannot touch, you cannot meet, you cannot physically interact. You live in parallel worlds, making parallel interactions and conversations. You feel the constant pressure of doom, death, and the end. But once again there is no explanation for this- this world in which nothing makes sense.