Consider the following premises. If Charles were not poor, then Sarah is a cashier. If Sarah were a cashier, then Charles is climbing a mountain. If Charles climbs a mountain, then it is windy. Barbara is a musician if and only if Charles is poor. Barbara is not a musician. Can we infer the following from them? It is not windy.
 From the fact that Barbara is a musician if and only if Charles is poor, and that Barbara is not a musician we can infer that Charles is not poor. From the fact that if Sarah were a cashier, then Charles is climbing a mountain, and that if Charles climbs a mountain, then it is windy we can infer that if Sarah were a cashier, then it is windy. From the fact that if Charles were not poor, then Sarah is a cashier, and that if Sarah were a cashier, then it is windy we can infer that if Charles were not poor, then it is windy. Finally, from the fact that if Charles were not poor, then it is windy, and that Charles is not poor we can infer that it is windy, which contradicts that It is not windy. Therefore, the answer is no.