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_1 -> p_7. p_1 or t_2. p_7 -> ~r_3.
~p_7 can be inferred via the modus tollens rule. p_1 -> ~r_3 can be inferred via the transitivity rule.