Consider the following premises. Linda is a bartender if and only if Karen is fast. Karen is not fast. It is windy. If it is windy, then it is snowing. Can we infer the following from them? It is snowing and Linda is not a bartender.
 From the fact that Linda is a bartender if and only if Karen is fast we can infer that if Linda were a bartender, then Karen is fast. From the fact that if it is windy, then it is snowing, and that it is windy we can infer that it is snowing. From the fact that if Linda were a bartender, then Karen is fast, and that Karen is not fast we can infer that Linda is not a bartender. Finally, from the fact that it is snowing, and that Linda is not a bartender we can infer that it is snowing and Linda is not a bartender. Therefore, the answer is yes.