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) <-> W_3(x_6). forall x_6: ~P_6(x_6). forall x_6: ~P_2(x_6) or P_3(x_6). exists x_6: P_2(x_6) or W_3(x_6).
exists x_6: W_3(x_6) or P_3(x_6) can be inferred via the existential resolution rule. forall x_6: P_6(x_6) -> W_3(x_6) can be inferred via the universal biconditional elimination rule. forall x_6: W_3(x_6) -> P_6(x_6) can be inferred via the universal biconditional elimination rule. forall x_6: ~W_3(x_6) can be inferred via the universal biconditional elimination rule.