What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: P_15(x_15). forall x_15: P_15(x_15) -> W_1(x_15). exists x_15: W_1(x_15) <-> T(x_15).
forall x_15: W_1(x_15). exists x_15: W_1(x_15) -> T(x_15). exists x_15: T(x_15) -> W_1(x_15).