Consider the following premises. For all x_9, x_9 will cook if and only if x_9 is a taxi driver. There is at least one x_9 for which x_9 will cook if and only if x_9 is an electrician. For all x_9, if x_9 cooks, then x_9 is a taxi driver. For all x_9, x_9 is not a taxi driver. Can we infer the following from them? For all x_9, x_9 is an electrician.
 From the fact that for all x_9, x_9 will cook if and only if x_9 is a taxi driver we can infer that for all x_9, if x_9 were a taxi driver, then x_9 is cooking. From the fact that for all x_9, if x_9 were a taxi driver, then x_9 is cooking, and that for all x_9, if x_9 cooks, then x_9 is a taxi driver we can infer that for all x_9, x_9 is a taxi driver if and only if x_9 will cook. From the fact that for all x_9, x_9 is a taxi driver if and only if x_9 will cook, and that for all x_9, x_9 is not a taxi driver we can infer that for all x_9, x_9 will not cook. Finally, from the fact that there is at least one x_9 for which x_9 will cook if and only if x_9 is an electrician, and that for all x_9, x_9 will not cook we can infer that there is at least one x_9 for which x_9 is not an electrician, which contradicts that For all x_9, x_9 is an electrician. Therefore, the answer is no.