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_2. ~t -> p. p_2 <-> t.
p_2 -> t can be inferred via the biconditional elimination rule. t -> p_2 can be inferred via the biconditional elimination rule. ~t can be inferred via the biconditional elimination rule.