Consider the following premises. There is at least one x_5 for which x_5 will not climb a mountain. For all x_5, if x_5 takes a plane, then x_5 is sleeping. For all x_5, x_5 will climb a mountain or x_5 will take a plane. Can we infer the following from them? For all x_5, x_5 will not sleep.
 From the fact that for all x_5, x_5 will climb a mountain or x_5 will take a plane, and that there is at least one x_5 for which x_5 will not climb a mountain we can infer that there is at least one x_5 for which x_5 will take a plane. Finally, from the fact that for all x_5, if x_5 takes a plane, then x_5 is sleeping, and that there is at least one x_5 for which x_5 will take a plane we can infer that there is at least one x_5 for which x_5 will sleep, which contradicts that For all x_5, x_5 will not sleep. Therefore, the answer is no.