The Wall is about uncertainty. Tom is uncertain of his fate after his death. Fear of death haunts Juan. The role of the doctor is not totally defined. The prisoners are likely to be shot the next morning, so what role would a doctor really need to play if the prisoners are going to die the next day, other than to get information from the prisoners. Juan is uncertain of his fate until the guards read his doom. How will the pain be when the bullets go in and will we die quickly are questions on the minds of the prisoners. Pablo is uncertain that it is worth dying for the cause or a man. Pablo’s guessed where Gris would be hiding and Pablo expects to shot when they don’t find Gris. Pablo is uncertain why the guards release him in the yard. Pablo then finds himself back with an uncertain fate when he discovers his guess of Gris’s whereabouts was right.