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: Thomas is taking a plane. It is not cloudy. If it snows, then it is cloudy.
It is not snowing can be inferred via the modus tollens rule. Thomas is taking a plane and it is not cloudy can be inferred via the conjunction rule. It is not cloudy and Thomas is taking a plane can be inferred via the conjunction rule.