Consider the following premises. For all x_6, if x_6 goes running, then x_6 is curious. For all x_6, x_6 is a nurse or x_6 will go running. For all x_6, x_6 is not a nurse or x_6 will work. There is at least one x_6 for which x_6 will work if and only if x_6 is curious. Can we infer the following from them? For all x_6, x_6 is not curious.
 From the fact that there is at least one x_6 for which x_6 will work if and only if x_6 is curious we can infer that there is at least one x_6 for which if x_6 works, then x_6 is curious. From the fact that for all x_6, x_6 is a nurse or x_6 will go running, and that for all x_6, x_6 is not a nurse or x_6 will work we can infer that for all x_6, x_6 will go running or x_6 will work. Finally, from the fact that for all x_6, if x_6 goes running, then x_6 is curious, that there is at least one x_6 for which if x_6 works, then x_6 is curious, and that for all x_6, x_6 will go running or x_6 will work we can infer that there is at least one x_6 for which x_6 is curious, which contradicts that For all x_6, x_6 is not curious. Therefore, the answer is no.