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_11 <-> t. p -> t. p_11 -> p.
p_11 -> t can be inferred via the transitivity rule. p_11 -> t can be inferred via the biconditional elimination rule. t -> p_11 can be inferred via the biconditional elimination rule.