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 -> ~r_2. ~w_2. ~q_16 -> r_2. q_4 <-> w_2. q_4 <-> q_16.
q_4 -> w_2 can be inferred via the biconditional elimination rule. q_4 -> q_16 can be inferred via the biconditional elimination rule. w_2 -> q_4 can be inferred via the biconditional elimination rule. q_16 -> q_4 can be inferred via the biconditional elimination rule. ~q_4 can be inferred via the biconditional elimination rule.