
theorem :: Corollary 1.5.7 (iii)
  for I being BinOp of [.0,1.],
      N being Fuzzy_Negation st
    I is N-satisfying_CP holds
      N is negation-strong implies
      (I is satisfying_(NP) iff N = FNegation I)
        by Lemma154va,Lemma156i;
