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_1 -> p_2. p_1 or q. p_2 -> q_6. ~q_6.
~p_2 can be inferred via the modus tollens rule. p_1 -> q_6 can be inferred via the transitivity rule.