Consider the following premises. If Thomas were a cashier, then James is rich. For all y_3, y_3 is a cashier if and only if y_3 is an office clerk. If Thomas were an office clerk, then Richard is not curious. If James were rich, then Thomas is a cashier. Richard is curious. Can we infer the following from them? James is rich.
 From the fact that for all y_3, y_3 is a cashier if and only if y_3 is an office clerk we can infer that Thomas is a cashier if and only if Thomas is an office clerk. From the fact that if Thomas were an office clerk, then Richard is not curious, and that Richard is curious we can infer that Thomas is not an office clerk. From the fact that if Thomas were a cashier, then James is rich, and that if James were rich, then Thomas is a cashier we can infer that Thomas is a cashier if and only if James is rich. From the fact that Thomas is a cashier if and only if Thomas is an office clerk, and that Thomas is not an office clerk we can infer that Thomas is not a cashier. Finally, from the fact that Thomas is a cashier if and only if James is rich, and that Thomas is not a cashier we can infer that James is not rich, which contradicts that James is rich. Therefore, the answer is no.