The file main.v has statement of the main theorem in it, dependent to other files. Logic_and_Set_Theory contains our primitive definitions which is syntax, semantics and proof theory for classical propositional logic. Files with "EoM" in their name were supposed to be in an independent folder, which was could have another subfolders "L_1_4_10" and "L_1_4_11". "L_1_4_10" and "L_1_4_11" are Lemmas 1.4.10 and 1.4.11 in Ardeshir's book!!! "EoM" is Existence of Model.