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_1 or s. t_1 -> w_4. t_3 <-> w_4. ~t_3.
t_3 -> w_4 can be inferred via the biconditional elimination rule. w_4 -> t_3 can be inferred via the biconditional elimination rule. ~w_4 can be inferred via the biconditional elimination rule.