Consider the following premises. It is windy. Robert is a soldier if and only if it is late. If it is late, then it is overcast. It is not overcast. Can we infer the following from them? Robert is a soldier.
 From the fact that if it is late, then it is overcast, and that it is not overcast we can infer that it is not late. Finally, from the fact that Robert is a soldier if and only if it is late, and that it is not late we can infer that Robert is not a soldier, which contradicts that Robert is a soldier. Therefore, the answer is no.