What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? ~w_1. s_4 <-> w_1. s <-> p. ~p.
~w_1 and ~p. ~p and ~w_1. s_4 -> w_1. s -> p. w_1 -> s_4. p -> s. ~s_4. ~s.