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: w and q. w_3 <-> r. ~w_3.
w can be inferred via the simplification rule. q can be inferred via the simplification rule. w_3 -> r can be inferred via the biconditional elimination rule. r -> w_3 can be inferred via the biconditional elimination rule. ~r can be inferred via the biconditional elimination rule.