What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? S_8(a_8) -> s_3. forall x_8: R_8(x_8) or S_8(x_8). s_3 <-> R_8(a_8).
s_3 -> R_8(a_8). R_8(a_8) -> s_3.