Consider the following premises. For all x_9, if x_9 plays tennis, then x_9 is an electrician. There is at least one x_9 for which x_9 will cook if and only if x_9 will sleep. For all x_9, if x_9 were an electrician, then x_9 is sleeping. For all x_9, x_9 will not cook. Can we infer the following from them? There is at least one x_9 for which x_9 will not play tennis.
 From the fact that there is at least one x_9 for which x_9 will cook if and only if x_9 will sleep, 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 will not sleep. From the fact that for all x_9, if x_9 plays tennis, then x_9 is an electrician, and that for all x_9, if x_9 were an electrician, then x_9 is sleeping we can infer that for all x_9, if x_9 plays tennis, then x_9 is sleeping. Finally, from the fact that for all x_9, if x_9 plays tennis, then x_9 is sleeping, and that there is at least one x_9 for which x_9 will not sleep we can infer that there is at least one x_9 for which x_9 will not play tennis. Therefore, the answer is yes.