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: Sarah is not a sailor. If Robert cooks, then Sarah is a sailor. It is cold.
Robert is not cooking can be inferred via the modus tollens rule. Sarah is not a sailor and it is cold can be inferred via the conjunction rule. It is cold and Sarah is not a sailor can be inferred via the conjunction rule.