Consider the following premises. There is at least one x_6 for which if x_6 were a taxi driver, then x_6 is drinking water. For all x_6, x_6 is a taxi driver. For all x_6, if x_6 were an office clerk, then x_6 is drinking water. For all x_6, if x_6 drinks water, then x_6 is an office clerk. Can we infer the following from them? For all x_6, x_6 will not drink water.
 From the fact that for all x_6, x_6 is a taxi driver we can infer that for all x_6, x_6 is a taxi driver or x_6 is an office clerk. From the fact that for all x_6, if x_6 drinks water, then x_6 is an office clerk, and that for all x_6, if x_6 were an office clerk, then x_6 is drinking water we can infer that for all x_6, x_6 will drink water if and only if x_6 is an office clerk. From the fact that for all x_6, x_6 will drink water if and only if x_6 is an office clerk we can infer that for all x_6, if x_6 were an office clerk, then x_6 is drinking water. Finally, from the fact that there is at least one x_6 for which if x_6 were a taxi driver, then x_6 is drinking water, that for all x_6, if x_6 were an office clerk, then x_6 is drinking water, and that for all x_6, x_6 is a taxi driver or x_6 is an office clerk we can infer that there is at least one x_6 for which x_6 will drink water, which contradicts that For all x_6, x_6 will not drink water. Therefore, the answer is no.