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 <-> w. w -> ~s. s_2. s_2 -> q_10. s.
q_10 can be inferred via the modus ponens rule. ~w can be inferred via the modus tollens rule. s_2 and s can be inferred via the conjunction rule. s and s_2 can be inferred via the conjunction rule. p -> w can be inferred via the biconditional elimination rule. w -> p can be inferred via the biconditional elimination rule.