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_3 -> p_3. p_3 -> s_1. s_1 -> r_3.
r_3 -> s_1 can be inferred via the transitivity rule. p_3 -> r_3 can be inferred via the transitivity rule. s_1 -> p_3 can be inferred via the transitivity rule.