Consider the following premises. It is cold or it is not raining. Richard is a server if and only if it is cold. Can we infer the following from them? If it rains, then Richard is a server.
 From the fact that Richard is a server if and only if it is cold we can infer that if it is cold, then Richard is a server. From the fact that it is cold or it is not raining we can infer that if it rains, then it is cold. Finally, from the fact that if it rains, then it is cold, and that if it is cold, then Richard is a server we can infer that if it rains, then Richard is a server. Therefore, the answer is yes.