Consider the following premises. Elisabeth is not a scientist. Elisabeth is a scientist if and only if Linda is playing squash. It is windy if and only if Linda is playing squash. Can we infer the following from them? It is not windy or it is raining.
 From the fact that Elisabeth is a scientist if and only if Linda is playing squash, and that Elisabeth is not a scientist we can infer that Linda is not playing squash. From the fact that it is windy if and only if Linda is playing squash, and that Linda is not playing squash we can infer that it is not windy. Finally, from the fact that it is not windy we can infer that it is not windy or it is raining. Therefore, the answer is yes.