Consider the following premises. Richard is making tea. If it is windy, then Robert is a soldier. If Robert were a soldier, then it is windy. If Robert were a soldier, then Richard is not making tea. Can we infer the following from them? If we can, name the inference rule being used: It is windy.
 From the fact that if it is windy, then Robert is a soldier, and that if Robert were a soldier, then it is windy we can infer that it is windy if and only if Robert is a soldier via biconditional introduction. From the fact that if Robert were a soldier, then Richard is not making tea, and that Richard is making tea we can infer that Robert is not a soldier via modus tollens. Finally, from the fact that it is windy if and only if Robert is a soldier, and that Robert is not a soldier we can infer that it is not windy via biconditional elimination, which contradicts that It is windy. Therefore, the answer is no.