What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? p_6 -> w_2. ~s_2. w_2 -> p_6. s_2 <-> w_2.
p_6 <-> w_2. w_2 <-> p_6. s_2 -> w_2. w_2 -> s_2. ~w_2.