Consider the following premises. There is at least one x_7 for which if x_7 writes a letter, then x_7 is drinking water. For all x_7, x_7 will write a letter or x_7 will play a game. For all x_7, if x_7 plays a game, then x_7 is drinking water. Can we infer the following from them? There is at least one x_7 for which x_7 will drink water or x_7 will play squash.
 From the fact that there is at least one x_7 for which if x_7 writes a letter, then x_7 is drinking water, that for all x_7, if x_7 plays a game, then x_7 is drinking water, and that for all x_7, x_7 will write a letter or x_7 will play a game we can infer that there is at least one x_7 for which x_7 will drink water. Finally, from the fact that there is at least one x_7 for which x_7 will drink water we can infer that there is at least one x_7 for which x_7 will drink water or x_7 will play squash. Therefore, the answer is yes.