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_2 -> q_1. ~q_1. q_6 -> q_2. p_6 -> q_6.
~q_2 can be inferred via the modus tollens rule. q_6 -> q_1 can be inferred via the transitivity rule. p_6 -> q_2 can be inferred via the transitivity rule.