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: T(a_10) or u. forall z: U_2(z) <-> T(z). u -> p_1. U_2(a_10) -> p_1.
forall z: U_2(z) -> T(z) can be inferred via the universal biconditional elimination rule. forall z: T(z) -> U_2(z) can be inferred via the universal biconditional elimination rule.