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 -> r_6. q_4 or t. t -> r. q_4 -> r_6. r -> t_1.
t -> t_1 can be inferred via the transitivity rule. r -> r_6 can be inferred via the transitivity rule.