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 <-> q_24. ~r_1. s_4 or q_24. s_4 -> t. r_1 or w.
w can be inferred via the disjunctive syllogism rule. t -> q_24 can be inferred via the biconditional elimination rule. q_24 -> t can be inferred via the biconditional elimination rule.