Consider the following premises. For all x_13, if x_13 were a server, then x_13 is not sleeping. There is at least one x_13 for which x_13 will cook or x_13 is not a server. For all x_13, x_13 is a server if and only if x_13 will cook. For all x_13, x_13 will sleep. Can we infer the following from them? For all x_13, x_13 will cook.
 From the fact that there is at least one x_13 for which x_13 will cook or x_13 is not a server we can infer that there is at least one x_13 for which if x_13 were a server, then x_13 is cooking. From the fact that for all x_13, x_13 is a server if and only if x_13 will cook we can infer that for all x_13, if x_13 cooks, then x_13 is a server. From the fact that there is at least one x_13 for which if x_13 were a server, then x_13 is cooking, and that for all x_13, if x_13 cooks, then x_13 is a server we can infer that there is at least one x_13 for which x_13 is a server if and only if x_13 will cook. From the fact that for all x_13, if x_13 were a server, then x_13 is not sleeping, and that for all x_13, x_13 will sleep we can infer that for all x_13, x_13 is not a server. Finally, from the fact that there is at least one x_13 for which x_13 is a server if and only if x_13 will cook, and that for all x_13, x_13 is not a server we can infer that there is at least one x_13 for which x_13 will not cook, which contradicts that For all x_13, x_13 will cook. Therefore, the answer is no.