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 -> p. q_6 -> t_1. p -> q_6. t_1 -> q.
q -> q_6 can be inferred via the transitivity rule. q_6 -> q can be inferred via the transitivity rule. p -> t_1 can be inferred via the transitivity rule. t_1 -> p can be inferred via the transitivity rule.