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_17: W(x_17) <-> Q_14(x_17). forall x_17: Q_14(x_17) or P_17(x_17). forall x_17: S(x_17) -> ~W(x_17). forall x_17: P_17(x_17) <-> W(x_17).
forall x_17: P_17(x_17) -> W(x_17) can be inferred via the universal biconditional elimination rule. exists x_17: W(x_17) -> Q_14(x_17) can be inferred via the existential biconditional elimination rule. forall x_17: W(x_17) -> P_17(x_17) can be inferred via the universal biconditional elimination rule. exists x_17: Q_14(x_17) -> W(x_17) can be inferred via the existential biconditional elimination rule.