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: exists x_19: S(x_19) <-> Q_16(x_19). forall x_19: P_19(x_19) or S(x_19). forall x_19: ~P_19(x_19) or W_3(x_19). forall x_19: ~Q_16(x_19). forall x_19: W(x_19).
forall x_19: S(x_19) or W_3(x_19) can be inferred via the universal resolution rule. exists x_19: S(x_19) -> Q_16(x_19) can be inferred via the existential biconditional elimination rule. exists x_19: Q_16(x_19) -> S(x_19) can be inferred via the existential biconditional elimination rule. exists x_19: ~S(x_19) can be inferred via the existential biconditional elimination rule.