Consider the following premises. There is at least one x_8 for which if x_8 sleeps, then x_8 is playing squash. For all x_8, if x_8 drives a car, then x_8 is playing squash. For all x_8, x_8 is fast. For all x_8, x_8 will drive a car or x_8 is not fast. Can we infer the following from them? There is at least one x_8 for which x_8 will play squash.
 From the fact that for all x_8, x_8 will drive a car or x_8 is not fast we can infer that for all x_8, if x_8 were fast, then x_8 is driving a car. From the fact that for all x_8, if x_8 were fast, then x_8 is driving a car, and that for all x_8, x_8 is fast we can infer that for all x_8, x_8 will drive a car. From the fact that for all x_8, x_8 will drive a car we can infer that for all x_8, x_8 will drive a car or x_8 will sleep. Finally, from the fact that for all x_8, if x_8 drives a car, then x_8 is playing squash, that there is at least one x_8 for which if x_8 sleeps, then x_8 is playing squash, and that for all x_8, x_8 will drive a car or x_8 will sleep we can infer that there is at least one x_8 for which x_8 will play squash. Therefore, the answer is yes.