Consider the following premises. For all x_4, x_4 will work. For all x_4, if x_4 were a police officer, then x_4 is playing squash. For all x_4, if x_4 makes tea, then x_4 is playing squash. There is at least one x_4 for which x_4 will not work or x_4 will make tea. Can we infer the following from them? There is at least one x_4 for which x_4 will play squash.
 From the fact that for all x_4, x_4 will work we can infer that for all x_4, x_4 will work or x_4 is a police officer. From the fact that for all x_4, x_4 will work or x_4 is a police officer, and that there is at least one x_4 for which x_4 will not work or x_4 will make tea we can infer that there is at least one x_4 for which x_4 is a police officer or x_4 will make tea. Finally, from the fact that for all x_4, if x_4 were a police officer, then x_4 is playing squash, that for all x_4, if x_4 makes tea, then x_4 is playing squash, and that there is at least one x_4 for which x_4 is a police officer or x_4 will make tea we can infer that there is at least one x_4 for which x_4 will play squash. Therefore, the answer is yes.