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_3 -> q_1. w_4 <-> t_3. ~q_1.
~t_3 can be inferred via the modus tollens rule. w_4 -> t_3 can be inferred via the biconditional elimination rule. t_3 -> w_4 can be inferred via the biconditional elimination rule.