Consider the following premises. For all x_8, x_8 will drink water if and only if x_8 is fast. There is at least one x_8 for which x_8 is fast or x_8 will play squash. For all x_8, if x_8 were happy, then x_8 is drinking water. For all x_8, if x_8 plays squash, then x_8 is happy. Can we infer the following from them? There is at least one x_8 for which x_8 will drink water.
 From the fact that for all x_8, x_8 will drink water if and only if x_8 is fast we can infer that for all x_8, if x_8 were fast, then x_8 is drinking water. From the fact that for all x_8, if x_8 plays squash, then x_8 is happy, and that for all x_8, if x_8 were happy, then x_8 is drinking water we can infer that for all x_8, if x_8 plays squash, then x_8 is drinking water. Finally, from the fact that for all x_8, if x_8 were fast, then x_8 is drinking water, that for all x_8, if x_8 plays squash, then x_8 is drinking water, and that there is at least one x_8 for which x_8 is fast or x_8 will play squash we can infer that there is at least one x_8 for which x_8 will drink water. Therefore, the answer is yes.