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: u -> p_10. p -> u. p_10 <-> p. ~p_10.
~u can be inferred via the modus tollens rule. p -> p_10 can be inferred via the transitivity rule. p_10 -> p can be inferred via the biconditional elimination rule. p -> p_10 can be inferred via the biconditional elimination rule. ~p can be inferred via the biconditional elimination rule.