Consider the following premises. For all x_9, x_9 is a scientist or x_9 is a taxi driver. For all x_9, x_9 is not a soldier. For all x_9, if x_9 were a scientist, then x_9 is a soldier. There is at least one x_9 for which if x_9 were a soldier, then x_9 is a scientist. Can we infer the following from them? There is at least one x_9 for which x_9 is a taxi driver.
 From the fact that there is at least one x_9 for which if x_9 were a soldier, then x_9 is a scientist, and that for all x_9, if x_9 were a scientist, then x_9 is a soldier we can infer that there is at least one x_9 for which x_9 is a soldier if and only if x_9 is a scientist. From the fact that there is at least one x_9 for which x_9 is a soldier if and only if x_9 is a scientist, and that for all x_9, x_9 is not a soldier we can infer that there is at least one x_9 for which x_9 is not a scientist. Finally, from the fact that for all x_9, x_9 is a scientist or x_9 is a taxi driver, and that there is at least one x_9 for which x_9 is not a scientist we can infer that there is at least one x_9 for which x_9 is a taxi driver. Therefore, the answer is yes.