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_7 or ~p_4. ~p_7. p_4 <-> w_2.
~p_4 can be inferred via the disjunctive syllogism rule. p_4 -> p_7 can be inferred via the rewriting rule. p_4 -> w_2 can be inferred via the biconditional elimination rule. w_2 -> p_4 can be inferred via the biconditional elimination rule.