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_4: Q_1(y_4) -> S(y_4). r. Q_1(h).
r and Q_1(h) can be inferred via the conjunction rule. Q_1(h) and r can be inferred via the conjunction rule. exists x: Q_1(x) can be inferred via the existential generalization rule.