Consider the following premises. William is an office clerk or it is not windy. If William were an office clerk, then it is not snowing. It is snowing. Can we infer the following from them? It is not windy.
 From the fact that William is an office clerk or it is not windy we can infer that if it is windy, then William is an office clerk. From the fact that if William were an office clerk, then it is not snowing, and that it is snowing we can infer that William is not an office clerk. Finally, from the fact that if it is windy, then William is an office clerk, and that William is not an office clerk we can infer that it is not windy. Therefore, the answer is yes.