Consider the following premises. If Richard were a bartender, then Michael is a server. Richard is a bartender if and only if it is snowing. If Michael were a server, then Richard is a bartender. Can we infer the following from them? If Michael were a server, then it is snowing.
 From the fact that Richard is a bartender if and only if it is snowing we can infer that if Richard were a bartender, then it is snowing. From the fact that if Richard were a bartender, then Michael is a server, and that if Michael were a server, then Richard is a bartender we can infer that Richard is a bartender if and only if Michael is a server. From the fact that Richard is a bartender if and only if Michael is a server we can infer that if Michael were a server, then Richard is a bartender. Finally, from the fact that if Michael were a server, then Richard is a bartender, and that if Richard were a bartender, then it is snowing we can infer that if Michael were a server, then it is snowing. Therefore, the answer is yes.