Consider the following premises. If it is cold, then Robert is an office clerk. If Robert were an office clerk, then Jennifer is a soldier. If Robert were an office clerk, then it is cold. If Jennifer were a soldier, then it is cold. Can we infer the following from them? Jennifer is a soldier if and only if Robert is an office clerk.
 From the fact that if Robert were an office clerk, then it is cold, and that if it is cold, then Robert is an office clerk we can infer that Robert is an office clerk if and only if it is cold. From the fact that Robert is an office clerk if and only if it is cold we can infer that if it is cold, then Robert is an office clerk. From the fact that if Jennifer were a soldier, then it is cold, and that if it is cold, then Robert is an office clerk we can infer that if Jennifer were a soldier, then Robert is an office clerk. Finally, from the fact that if Jennifer were a soldier, then Robert is an office clerk, and that if Robert were an office clerk, then Jennifer is a soldier we can infer that Jennifer is a soldier if and only if Robert is an office clerk. Therefore, the answer is yes.