reserve x for set,
  D for non empty set,
  k, n for Nat,
  z for Nat;
reserve
  N for with_zero set,
  S for IC-Ins-separated non empty
          with_non-empty_values AMI-Struct over N,
  i for Element of the InstructionsF of S,
  l, l1, l2, l3 for Nat,
  s for State of S;
reserve ss for Element of product the_Values_of S;

theorem Th6:
  for i being Element of the InstructionsF of STC N
    holds InsCode i = 1 or InsCode i = 0
proof
  let i be Element of the InstructionsF of STC N;
  the InstructionsF of STC N = III by Def7;
  then i = [1,0,0] or i = [0,0,0] by TARSKI:def 2;
  hence thesis;
end;
