Consider the following premises. It is cloudy if and only if Linda is making tea. It is snowing if and only if it is cloudy. If Mary were an electrician, then it is snowing. Linda is not making tea. Can we infer the following from them? Mary is an electrician.
 From the fact that it is cloudy if and only if Linda is making tea, and that Linda is not making tea we can infer that it is not cloudy. From the fact that it is snowing if and only if it is cloudy, and that it is not cloudy we can infer that it is not snowing. Finally, from the fact that if Mary were an electrician, then it is snowing, and that it is not snowing we can infer that Mary is not an electrician, which contradicts that Mary is an electrician. Therefore, the answer is no.