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_2 <-> s. s <-> q_10. t_4 -> q_10. ~t_2. t_4 or ~q_10.
q_10 -> t_4 can be inferred via the rewriting rule. t_2 -> s can be inferred via the biconditional elimination rule. s -> q_10 can be inferred via the biconditional elimination rule. s -> t_2 can be inferred via the biconditional elimination rule. q_10 -> s can be inferred via the biconditional elimination rule. ~s can be inferred via the biconditional elimination rule.