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_2: P_3(x_2) <-> T(x_2). T(a_5) -> W_4(a_5). forall x_2: W_4(x_2) -> P_3(x_2).
forall x_2: P_3(x_2) -> T(x_2) can be inferred via the universal biconditional elimination rule. forall x_2: T(x_2) -> P_3(x_2) can be inferred via the universal biconditional elimination rule.