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: If Richard were excited, then Michael is drinking water. Richard is excited. Patricia is sleeping.
Michael is drinking water can be inferred via the modus ponens rule. Richard is excited and Patricia is sleeping can be inferred via the conjunction rule. Patricia is sleeping and Richard is excited can be inferred via the conjunction rule.