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: ~U(z). q <-> U(a_10). p -> q.
q -> U(a_10) can be inferred via the biconditional elimination rule. U(a_10) -> q can be inferred via the biconditional elimination rule.