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 it rains, then it is not snowing. It is cloudy if and only if it is cold. It is snowing. James is a cashier or it is cloudy. If James were a cashier, then it is cold.
It is not raining can be inferred via the modus tollens rule. If it is cloudy, then it is cold can be inferred via the biconditional elimination rule. If it is cold, then it is cloudy can be inferred via the biconditional elimination rule.