Consider the following premises. It is sunny if and only if it is overcast. It is not overcast. William is making tea if and only if Linda is playing a game. If Linda were a janitor, then William is making tea. Linda is not playing a game. Can we infer the following from them? If we can, name the inference rule being used: If Linda were not a janitor, then it is not sunny.
We cannot infer that from the premises. Therefore the answer is no.