Consider the following premises. There is at least one x_3 for which if x_3 were a scientist, then x_3 is running. For all x_3, if x_3 goes running, then x_3 is curious. For all x_3, x_3 will not go running. For all x_3, if x_3 were curious, then x_3 is a scientist. Can we infer the following from them? There is at least one x_3 for which x_3 is not a scientist.
 From the fact that for all x_3, if x_3 goes running, then x_3 is curious, and that for all x_3, if x_3 were curious, then x_3 is a scientist we can infer that for all x_3, if x_3 goes running, then x_3 is a scientist. From the fact that there is at least one x_3 for which if x_3 were a scientist, then x_3 is running, and that for all x_3, if x_3 goes running, then x_3 is a scientist we can infer that there is at least one x_3 for which x_3 is a scientist if and only if x_3 will go running. Finally, from the fact that there is at least one x_3 for which x_3 is a scientist if and only if x_3 will go running, and that for all x_3, x_3 will not go running we can infer that there is at least one x_3 for which x_3 is not a scientist. Therefore, the answer is yes.