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: ~t. q_10 -> t. ~q_10 -> s_1. t -> q_10.
~q_10 can be inferred via the modus tollens rule. q_10 <-> t can be inferred via the biconditional introduction rule. t <-> q_10 can be inferred via the biconditional introduction rule.