Consider the following premises. Elisabeth is a soldier. Elisabeth is a soldier if and only if Thomas is driving a car. Can we infer the following from them? If we can, name the inference rule being used: Thomas is driving a car or it is late.
 From the fact that Elisabeth is a soldier if and only if Thomas is driving a car we can infer that if Elisabeth were a soldier, then Thomas is driving a car via biconditional elimination. From the fact that if Elisabeth were a soldier, then Thomas is driving a car, and that Elisabeth is a soldier we can infer that Thomas is driving a car via modus ponens. Finally, from the fact that Thomas is driving a car we can infer that Thomas is driving a car or it is late via addition. Therefore, the answer is yes.