What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? exists x_8: S_1(x_8) -> U(x_8). forall x_8: P_7(x_8) or P(x_8). forall x_8: U(x_8) -> S_1(x_8). forall x_8: ~P_7(x_8) or U(x_8). forall x_8: P(x_8) -> S_1(x_8).
exists x_8: P(x_8) -> U(x_8). forall x_8: P(x_8) or U(x_8). exists x_8: S_1(x_8) <-> U(x_8). exists x_8: U(x_8) <-> S_1(x_8).