fact: Definition be2_som4 := Neg (Ors (Ands (Ors (Ands (Neg (Var (Npos 9)) :: Neg (Var (Npos 8)) :: nil) :: Ands (Var (Npos 9) :: Var (Npos 8) :: nil) :: nil) :: Neg be2_cout3 :: nil) :: Ands (be2_cout3 :: Neg (Ors (Ands (Neg (Var (Npos 9)) :: Neg (Var (Npos 8)) :: nil) :: Ands (Var (Npos 9) :: Var (Npos 8) :: nil) :: nil)) :: nil) :: nil)).