set(auto). clear(print_given). formula_list(usable). all x ( x = x ). end_of_list. include("peirceanAx0.txt"). include("peirceanAx1.txt"). include("nDef.txt"). include("iDef.txt"). include("dDef.txt"). include("11booleanLaws.txt"). include("17To19booleanLaws.txt"). include("vi.txt"). include("vii.txt").