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 is windy, then William is driving a car. If William drives a car, then it is windy. If it is windy, then Elisabeth is not bored. Elisabeth is bored.
It is not windy can be inferred via the modus tollens rule. If William drives a car, then Elisabeth is not bored can be inferred via the transitivity rule. It is windy if and only if William is driving a car can be inferred via the biconditional introduction rule. William is driving a car if and only if it is windy can be inferred via the biconditional introduction rule.