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 z_3: U(z_3) <-> Q_3(z_3). exists z_3: U(z_3) or T(z_3). forall z_3: ~Q_3(z_3).
forall z_3: U(z_3) -> Q_3(z_3) can be inferred via the universal biconditional elimination rule. forall z_3: Q_3(z_3) -> U(z_3) can be inferred via the universal biconditional elimination rule. forall z_3: ~U(z_3) can be inferred via the universal biconditional elimination rule.