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 -> t_1. p_11 or p. s <-> t_1. p_11 -> t_1.
t_1 can be inferred via the disjunction elimination rule. s -> t_1 can be inferred via the biconditional elimination rule. t_1 -> s can be inferred via the biconditional elimination rule.