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: q_13 or q. w_4 <-> q_13. ~w_4. ~w_2 or s_3.
w_4 -> q_13 can be inferred via the biconditional elimination rule. q_13 -> w_4 can be inferred via the biconditional elimination rule. ~q_13 can be inferred via the biconditional elimination rule.