What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall x_6: P_6(x_6). forall x_6: P_6(x_6) -> Q_6(x_6). exists x_6: S_3(x_6). forall x_6: W_4(x_6).
forall x_6: Q_6(x_6) can be inferred via the universal modus ponens rule. forall x_6: P_6(x_6) and W_4(x_6) can be inferred via the universal conjunction rule. forall x_6: W_4(x_6) and P_6(x_6) can be inferred via the universal conjunction rule. exists x_6: S_3(x_6) and P_6(x_6) can be inferred via the existential conjunction rule. exists x_6: S_3(x_6) and W_4(x_6) can be inferred via the existential conjunction rule. exists x_6: P_6(x_6) and S_3(x_6) can be inferred via the existential conjunction rule. exists x_6: W_4(x_6) and S_3(x_6) can be inferred via the existential conjunction rule.