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: p_7 -> s_1. p_7 or ~w_2. s_1 -> w_2.
p_7 -> w_2 can be inferred via the transitivity rule. w_2 -> p_7 can be inferred via the rewriting rule.