Consider the following premises. For all x_11, x_11 is an artist or x_11 will not play squash. For all x_11, x_11 will play squash and x_11 is an office clerk. There is at least one x_11 for which if x_11 were an artist, then x_11 is drinking water. Can we infer the following from them? There is at least one x_11 for which x_11 will drink water.
 From the fact that for all x_11, x_11 is an artist or x_11 will not play squash we can infer that for all x_11, if x_11 plays squash, then x_11 is an artist. From the fact that for all x_11, if x_11 plays squash, then x_11 is an artist, and that there is at least one x_11 for which if x_11 were an artist, then x_11 is drinking water we can infer that there is at least one x_11 for which if x_11 plays squash, then x_11 is drinking water. From the fact that for all x_11, x_11 will play squash and x_11 is an office clerk we can infer that for all x_11, x_11 will play squash. Finally, from the fact that there is at least one x_11 for which if x_11 plays squash, then x_11 is drinking water, and that for all x_11, x_11 will play squash we can infer that there is at least one x_11 for which x_11 will drink water. Therefore, the answer is yes.