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 x_1: W(x_1). exists x_1: S(x_1).
exists x_1: S(x_1) and W(x_1) can be inferred via the existential conjunction rule. exists x_1: W(x_1) and S(x_1) can be inferred via the existential conjunction rule.