Consider the following premises. For all x_7, x_7 will drive a car if and only if x_7 will go running. For all x_7, x_7 will not drive a car. For all x_7, x_7 will go running or x_7 will drink water. Can we infer the following from them? There is at least one x_7 for which neither x_7 will drink water nor x_7 is a soldier.
 From the fact that for all x_7, x_7 will drive a car if and only if x_7 will go running, and that for all x_7, x_7 will not drive a car we can infer that for all x_7, x_7 will not go running. From the fact that for all x_7, x_7 will go running or x_7 will drink water, and that for all x_7, x_7 will not go running we can infer that for all x_7, x_7 will drink water. Finally, from the fact that for all x_7, x_7 will drink water we can infer that for all x_7, x_7 will drink water or x_7 is a soldier, which contradicts that There is at least one x_7 for which neither x_7 will drink water nor x_7 is a soldier. Therefore, the answer is no.