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: q_8 -> q_1. w -> p_8. p_8 -> q_8. q_1 -> w.
q_8 -> w can be inferred via the transitivity rule. w -> q_8 can be inferred via the transitivity rule. p_8 -> q_1 can be inferred via the transitivity rule. q_1 -> p_8 can be inferred via the transitivity rule.