Consider the following premises. It is snowing. It is cold. If Jennifer plays tennis, then it is not cold. Can we infer the following from them? If we can, name the inference rule being used: It is snowing or Elisabeth is running.
 From the fact that if Jennifer plays tennis, then it is not cold, and that it is cold we can infer that Jennifer is not playing tennis via modus tollens. From the fact that it is snowing, and that Jennifer is not playing tennis we can infer that it is snowing and Jennifer is not playing tennis via conjunction. From the fact that it is snowing and Jennifer is not playing tennis we can infer that it is snowing via simplification. Finally, from the fact that it is snowing we can infer that it is snowing or Elisabeth is running via addition. Therefore, the answer is yes.