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_10 -> s_2. q. s_4. s_4 -> q_19. q_19 -> q_10.
q_19 can be inferred via the modus ponens rule. s_4 -> q_10 can be inferred via the transitivity rule. q_19 -> s_2 can be inferred via the transitivity rule. q and s_4 can be inferred via the conjunction rule. s_4 and q can be inferred via the conjunction rule.