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: p_1. t. p <-> t. q_3 -> ~p_1. s_2 -> p.
~q_3 can be inferred via the modus tollens rule. p_1 and t can be inferred via the conjunction rule. t and p_1 can be inferred via the conjunction rule. p -> t can be inferred via the biconditional elimination rule. t -> p can be inferred via the biconditional elimination rule.