Consider the following premises. For all x_6, if x_6 drinks water, then x_6 is climbing a mountain. There is at least one x_6 for which if x_6 climbs a mountain, then x_6 is listening to a song. For all x_6, x_6 will play squash if and only if x_6 will listen to a song. Can we infer the following from them? There is at least one x_6 for which if x_6 drinks water, then x_6 is playing squash.
 From the fact that for all x_6, if x_6 drinks water, then x_6 is climbing a mountain, and that there is at least one x_6 for which if x_6 climbs a mountain, then x_6 is listening to a song we can infer that there is at least one x_6 for which if x_6 drinks water, then x_6 is listening to a song. From the fact that for all x_6, x_6 will play squash if and only if x_6 will listen to a song we can infer that for all x_6, if x_6 listens to a song, then x_6 is playing squash. Finally, from the fact that there is at least one x_6 for which if x_6 drinks water, then x_6 is listening to a song, and that for all x_6, if x_6 listens to a song, then x_6 is playing squash we can infer that there is at least one x_6 for which if x_6 drinks water, then x_6 is playing squash. Therefore, the answer is yes.