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: T(x) or W(x). T(a_8) <-> q_4. ~q_4.
T(a_8) -> q_4 can be inferred via the biconditional elimination rule. q_4 -> T(a_8) can be inferred via the biconditional elimination rule. ~T(a_8) can be inferred via the biconditional elimination rule.