What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: P_12(x_12) -> S_1(x_12). forall x_12: P(x_12) -> P_12(x_12). exists x_12: S_1(x_12) -> P_12(x_12). forall x_12: P(x_12) or S_1(x_12). forall x_12: P_12(x_12) -> P(x_12).
forall x_12: P(x_12) -> S_1(x_12). exists x_12: S_1(x_12) -> P(x_12). exists x_12: P_12(x_12). forall x_12: P(x_12) <-> P_12(x_12). forall x_12: P_12(x_12) <-> P(x_12). exists x_12: S_1(x_12) <-> P_12(x_12). exists x_12: P_12(x_12) <-> S_1(x_12).