What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? S_12(a_12) -> r_6. W_3(a_12) -> r_6. forall x_12: W_3(x_12) or S_12(x_12). r_6 -> w_1.
S_12(a_12) -> w_1. W_3(a_12) -> w_1.