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: r_1 -> p_1. p_1 -> q_1. q_1 -> r_1.
r_1 -> q_1 can be inferred via the transitivity rule. p_1 -> r_1 can be inferred via the transitivity rule. q_1 -> p_1 can be inferred via the transitivity rule.