Consider the following premises. If Robert works, then James is a musician. James is not a musician. Robert is working if and only if it is raining. Can we infer the following from them? If we can, name the inference rule being used: It is raining.
 From the fact that if Robert works, then James is a musician, and that James is not a musician we can infer that Robert is not working via modus tollens. Finally, from the fact that Robert is working if and only if it is raining, and that Robert is not working we can infer that it is not raining via biconditional elimination, which contradicts that It is raining. Therefore, the answer is no.