fact: Definition be2_som4 := Neg (Ors (Ands (Ors (Ands (Neg (Var (Npos 5)) :: Neg (Var (Npos 4)) :: nil) :: Ands (Var (Npos 5) :: Var (Npos 4) :: nil) :: nil) :: Neg be2_cout3 :: nil) :: Ands (be2_cout3 :: Neg (Ors (Ands (Neg (Var (Npos 5)) :: Neg (Var (Npos 4)) :: nil) :: Ands (Var (Npos 5) :: Var (Npos 4) :: nil) :: nil)) :: nil) :: nil)).