Consider the following premises. For all x_7, x_7 will not climb a mountain. There is at least one x_7 for which x_7 is a cashier or x_7 will not go running. For all x_7, x_7 will climb a mountain or x_7 will go running. Can we infer the following from them? There is at least one x_7 for which x_7 is a cashier.
 From the fact that there is at least one x_7 for which x_7 is a cashier or x_7 will not go running we can infer that there is at least one x_7 for which if x_7 goes running, then x_7 is a cashier. From the fact that for all x_7, x_7 will climb a mountain or x_7 will go running, and that for all x_7, x_7 will not climb a mountain we can infer that for all x_7, x_7 will go running. Finally, from the fact that there is at least one x_7 for which if x_7 goes running, then x_7 is a cashier, and that for all x_7, x_7 will go running we can infer that there is at least one x_7 for which x_7 is a cashier. Therefore, the answer is yes.