What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? W_1(a_8) <-> q_4. ~q_4. forall x_8: W_1(x_8) or S_8(x_8).
W_1(a_8) -> q_4. q_4 -> W_1(a_8). ~W_1(a_8).