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_1 -> q_10. ~q_10. p_1. q_10 -> r_1.
~r_1 can be inferred via the modus tollens rule. ~q_10 and p_1 can be inferred via the conjunction rule. p_1 and ~q_10 can be inferred via the conjunction rule. r_1 <-> q_10 can be inferred via the biconditional introduction rule. q_10 <-> r_1 can be inferred via the biconditional introduction rule.