Consider the following premises. It is late if and only if it is cold. It is cold if and only if Jennifer is an astronaut. It is not late. If Jennifer were not an astronaut, then Susan is running. Can we infer the following from them? Susan is running.
 From the fact that it is late if and only if it is cold, and that it is not late we can infer that it is not cold. From the fact that it is cold if and only if Jennifer is an astronaut, and that it is not cold we can infer that Jennifer is not an astronaut. Finally, from the fact that if Jennifer were not an astronaut, then Susan is running, and that Jennifer is not an astronaut we can infer that Susan is running. Therefore, the answer is yes.