Consider the following premises. There is at least one x_4 for which if x_4 were a taxi driver, then x_4 is a politician. For all x_4, if x_4 were an office clerk, then x_4 is a politician. For all x_4, x_4 is curious or x_4 is a taxi driver. For all x_4, x_4 is not curious. Can we infer the following from them? For all x_4, x_4 is not a politician.
 From the fact that for all x_4, x_4 is curious or x_4 is a taxi driver, and that for all x_4, x_4 is not curious we can infer that for all x_4, x_4 is a taxi driver. From the fact that for all x_4, x_4 is a taxi driver we can infer that for all x_4, x_4 is a taxi driver or x_4 is an office clerk. Finally, from the fact that there is at least one x_4 for which if x_4 were a taxi driver, then x_4 is a politician, that for all x_4, if x_4 were an office clerk, then x_4 is a politician, and that for all x_4, x_4 is a taxi driver or x_4 is an office clerk we can infer that there is at least one x_4 for which x_4 is a politician, which contradicts that For all x_4, x_4 is not a politician. Therefore, the answer is no.