What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: exists x_6: R_2(x_6) and P(x_6). forall x_6: U_4(x_6).
exists x_6: R_2(x_6) can be inferred via the existential simplification rule. exists x_6: P(x_6) can be inferred via the existential simplification rule.