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: forall y: U_4(y) and S(y). exists y: W_1(y).
forall y: U_4(y) can be inferred via the universal simplification rule. forall y: S(y) can be inferred via the universal simplification rule.