Consider the following premises. For all x_8, x_8 is an office clerk if and only if x_8 will play squash. For all x_8, if x_8 climbs a mountain, then x_8 is an office clerk. For all x_8, x_8 will play squash or x_8 will climb a mountain. There is at least one x_8 for which x_8 will work. Can we infer the following from them? There is at least one x_8 for which x_8 is an office clerk and x_8 will work.
 From the fact that for all x_8, x_8 is an office clerk if and only if x_8 will play squash we can infer that for all x_8, if x_8 plays squash, then x_8 is an office clerk. From the fact that for all x_8, if x_8 plays squash, then x_8 is an office clerk, that for all x_8, if x_8 climbs a mountain, then x_8 is an office clerk, and that for all x_8, x_8 will play squash or x_8 will climb a mountain we can infer that for all x_8, x_8 is an office clerk. Finally, from the fact that for all x_8, x_8 is an office clerk, and that there is at least one x_8 for which x_8 will work we can infer that there is at least one x_8 for which x_8 is an office clerk and x_8 will work. Therefore, the answer is yes.