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_11: Q_2(x_11) <-> W_1(x_11). forall x_11: W_1(x_11) or ~Q_11(x_11). forall x_11: T_4(x_11) or Q_2(x_11). forall x_11: T_4(x_11) -> Q_11(x_11).
forall x_11: Q_11(x_11) -> W_1(x_11) can be inferred via the universal rewriting rule. exists x_11: Q_2(x_11) -> W_1(x_11) can be inferred via the existential biconditional elimination rule. exists x_11: W_1(x_11) -> Q_2(x_11) can be inferred via the existential biconditional elimination rule.